• Amazon.com

Scosche Rhythm+ 2.0 Heart Rate Sensor In-Depth Review


Back in January, Scosche announced the new Rhythm+ 2.0 optical HR sensor. This would be the next iteration from their original Rhythm+ released way back in 2014 – arguably the optical HR sensor band that started the trend of optical HR armbands. Then in 2018 they released the Rhythm24, a more feature-laden product. That unit essentially added offline recording, NFC connectivity, and a pile of other features.

But the Rhythm+ 2.0 (which I’ll mostly abbreviate to R2) is much more simplistic, like the original Rhythm was. It broadcasts your heart rate over ANT+ & Bluetooth Smart, shows your zones…and…well…that’s about it. But that’s ultimately all most people want a heart rate sensor for – and of course, doing so accurately.

From a consumer standpoint the Rhythm+ 2.0 edition only changes three main things from the original: It increases the battery life from 8 hours to 24 hours, it changes the button so it doesn’t accidentally get turned on very easily, and it has a better strap that’s not Velcro. Under the covers the unit also changes the sensor too, going with a much newer Valencell version than the original.

I’ve got a bit more than two months’ worth of data on the Scosche Rhythm+ 2.0, comparing it against many of the sensors you’re likely to be choosing from, including the Polar Verity Sense, Polar OH1 Plus, mioPOD, and a slate of chest straps. Plus watches and more. I’ve got plenty of data and also basic usage tidbits.

Now, if you want all the details in one tidy video, simply hit the Play button below:

Note that once I’m done with the Scosche R2, I’ll send it and the umpteen units they sent me, back to Scosche. That’s just how I roll. If you found this post useful, consider becoming a DCR Supporter which makes the site ad-free, while also getting access to a mostly weekly video series behind the scenes of the DCR Cave. And of course, it makes you awesome.


I could probably spend half a day unboxing Scosche Rhythm+ 2.0 bands. In an effort to ensure I had every color available, the company sent me not one, but two copies of every color. Plus, more interestingly, the two boxed variants of the Rhythm+ 2.0. And a charging case or two. More on both of those in a second.


Notably, there are actually two different boxed versions of the Scosche Rhythm+ 2.0. One for retail stores, and one for Amazon. For Amazon, the box is roughly half the size. That saves on shipping (both cost and environmental aspects), and also saves on shelf space at Amazon, since Amazon charges companies based on the size of the item too. Whereas in a retail setting, you get the more descriptive one.


Here’s a close-up of the retail one:


Inside you’ve got the strap/pod, a USB charging cable, a paper quick start guide, and then a little yellow brochure of other Scosche products.


Here’s the charging cable, which snaps onto the unit, meaning you could make it into a lasso if you wanted, and it’ll stay put.


Then there’s the quick start guide:


As for the pod, you’re gonna see plenty of photos of that, but one thing of note here is to be sure to remove the small protective film. If you leave that there, you’ll get accuracy issues:


And the contents of the Amazon one are the same.

Then there’s the slate of straps to choose from. Material is the same, colors are (obviously) different. Notably, there’s also a grey band that’s offered specifically on Amazon.


Finally, there’s also this new charging case accessory you can buy extra (it’s $29, but on sale for $24). Basically it’s an 860mAh USB battery pack built into the side of a small case. It charges via USB-C, but has a ‘normal’ USB port inside, so you can plug in the Scosche to it while travelling:

DSC_2402 DSC_2407

I’m kinda surprised – I actually like it. Namely I find it a handy way to charge not just the Scosche R2, but anything else small – such as a watch or other HR sensor, while in transit. For example, sometimes early in the morning over breakfast, I’ll realize a watch/sensor I need isn’t charged yet – something that I might need for a workout/test once I get to the office. This has been handy to just stick the watch/sensor in there to charge, zip it up, and then throw it in my bag. I know the charging attachment won’t fall off, nice and secure in there. By the time I finish doing the morning bike commute/ and two-school drop-off with the kids, everything is charged. Plus, points for USB-C charging port on the outside (but ‘normal’ USB on the inside).

The Basics:

The Scosche R2 is a rather simple device in the grand scheme of things. At its core, you charge it, press the button to broadcast your heart rate via ANT+ & Bluetooth Smart, and then turn it off and charge it again at some point down the road. Rinse (literally), and repeat. While there’s no storage on it like the Rhythm 24 for saving workouts, it can display heart rate zones. So we’ll get into that too.

To begin, the band has been changed on the R2 to match that of the Scosche 24. However, they’ve changed the plastic a bit to hopefully eliminate any clasp snap issues. While those were rare, they did happen to some people that were traced to specific sunscreens causing the plastic to become brittle and crack. I haven’t ever had it happen to me, but figured it’s worth mentioning that they’ve noted they’ve fixed that.

In any event, the strap length adjusts via the middle piece:


Then the band attaches to the metal pole of the pod itself:


On the underside of the Scosche R2 is the optical sensor from Valencell, the same company Scosche tapped for their previous sensors. They generally make strong stuff, especially when in a band design (whereas they can struggle a bit more in a wrist-based product like a watch). You’ll see three LEDs, two green and one yellow. Then next to that are the photodiodes that measure that light as it reaches the blood capillaries in your arm:


The way optical HR sensors work is by measuring the light from these LEDs. Thus, the arch-nemesis of any optical heart rate sensor is other light – such as daylight. That, in turn, happens if you wear it loosely, which is the secondary enemy of optical HR sensor accuracy: bounce. But as long as you wear it snug, you’re fine. It doesn’t need to be crazy gorilla tight or anything, but it shouldn’t move around.

According to Scosche, you can place the unit in any one of three recommended locations: upper forearm, biceps, or triceps. I tend to wear mine mostly on the biceps or triceps, since I can usually hide that below a cycling jersey or t-shirt.


Ok, with it placed on my arm, I simply hold the button a few seconds to turn it on. That illuminates the LEDs on the underside, and then also a small colored LED atop the unit indicating it’s on. Because of the overall width of the Scosche, it’s virtually impossible to get accidentally flipped over (unlike the Polar OH1 Plus, which they largely fixed with the Verity Sense).


At this point, it’s findable via ANT+ & Bluetooth Smart, ready for you to pair another device. Ultimately, the point of a sensor like this is to replace a heart rate strap – in turn broadcasting to something else, like an app/watch/bike computer. People tend to use optical armbands such as the Scosche because they’re more comfortable than chest straps – often especially for women.

I’ve been using the Scosche R2 with a wide assortment of devices. These have included outings paired to a Garmin Edge 830/1030, Garmin Forerunner 945, COROS Vertix, Peloton Bike & Bike+, Strava App, and more. Ultimately it perfectly followed all the ANT+ & Bluetooth Smart standards, so if there’s an app or device it doesn’t work with, frankly, that app or device is probably the issue. The ANT+/BLE code here is undoubtedly the same code as on the original Scosche, and there’s no issues there, pairing-wise. Note that they claim a 100ft range for the wireless signal, I didn’t have any reason to be that far from my watches/apps/devices, but I never had any dropout issues.

Here’s an example paired up to a Garmin Edge 1030 Plus:


Then here it is paired to a Peloton Bike+. Note you’ll see both the ANT+ & Bluetooth sides here, so the ANT+ ID is 54, and then I’ve just tapped to pair it to the Bluetooth side (R+2.0 6422).


The Bluetooth ID matches the last four digits imprinted on the back of the unit:


And here to the Strava iOS app:

clip_image001[16] clip_image001[18]

Note however that while the Scosche R2 has unlimited concurrent ANT+ connections, it can only be actively paired to a single Bluetooth Smart device at a time. Meaning, you can’t pair it to both your Zwift Apple TV setup via Bluetooth Smart while also paired to your Suunto watch via Bluetooth Smart. However, you can always concurrently pair ANT+ & Bluetooth Smart. So since every Garmin/Peloton/Wahoo/Stages/Hammerhead/etc device supports ANT+ & Bluetooth Smart, you can always simply use ANT+ first, as I do.

Speaking of pairing and apps, you can download the Scosche Rhythm Sync app from the iOS/Android app stores, which lets you update the firmware and check your heart rate zones (but you can’t change them with the Scosche R2), as well as check the battery level. After downloading the app, have it search for sensors nearby (remember to turn it on first):

clip_image001[10] clip_image001[12] clip_image001[14]

If there’s a software update available, you can update that too. I suspect these will be few and far between, but in the odd event there’s some compatibility issue (as was the case initially when the R1 released or some really old Garmin watches, some 7 years ago), then they could address that.

clip_image001 clip_image001[6] clip_image001[8]

Ultimately though, think of the app for the R2 variant as more of a utility app than a download/record type app (whereas for the R24 edition, it does download). You likely won’t ever use the utility app beyond firmware updates.

The main point of the R2 is to broadcast to other apps, so once you’re done with your workout you’ll simply hold the top button down for a few seconds to turn it back off again. And with that, you’re done.


The battery life is claimed at 24 hours, and seems to be trending toward that – though I haven’t done any 24-hour activities, and since it doesn’t broadcast HRV, it’s less valuable as a 24×7 type tool. The previous unit had an 8-hour battery life claim, and my testing puts this well beyond that.

Heart Rate Accuracy:


For each test, I’m wearing additional devices, usually 3-4 in total, which capture data from other sensors.  This sometimes included a second strap, usually the Polar H10 chest strap or the Garmin HRM-PRO, as well as usually two optical sensor watches on the wrists, and then some other armband optical HR sensors. Note that the numbers you see in the upper right corner are *not* the averages, but rather just the exact point my mouse is sitting over.  Note all this data is analyzed using the DCR Analyzer, details here.

In my testing, I’m simply using the strap throughout my usual workouts.  Those workouts include a wide variety of intensities and conditions, making them great for accuracy testing.  I have a blend of interval and steady-state workouts on both running and cycling in here, both indoors and outdoors.

Ok, we’re gonna briefly look at this first boring set, a steady-state run, and then we’ll get into more exciting stuff. This set has a boatload of sensors, including both a Garmin HRM-PRO & Polar H10 chest strap (separated), a Polar OH1 Plus optical sensor, the Whoop band, a Polar Grit X watch (optical HR sensor), Garmin Enduro watch (optical HR sensor), and of course the Scosche R2, which was paired to a COROS Vertix. Here’s that data set:


Now, I’m going to save you trying to decode that Skittles bag of rainbow colors, and just simplify it. The Scosche R2 was virtually identical to the chest straps, and essentially spot-on. As was the Polar OH1 sensor – all the same here. So rather than beat that horse a bit, let’s increase the complexity.

This time with an interval run. These were a pile of 60-second repeats at sub-5K race pace with 30-seconds of recovery. It’s a fun way to test optical HR sensors. And by fun, I mean incredibly difficult. This was compared to a mioPOD, Polar Verity Sense, Garmin HRM-PRO, and Garmin Enduro. Arguably, this is one of the more impressive sets I’ve seen in a long time for optical HR sensor testing:


Things start off very good. You see a slight bobble from the Polar Verity Sense early on, but that’s because I thought I had turned it on, but didn’t. So I had started running a minute or so before it tried to get lock. Fair enough, that’s on me. After it locks, it’s largely fine. Let’s look at the first main interval set:


You can see above that all the units are very very close. The exception being a burp from the mioPOD on the first interval, and a tiny 1-2 second blip on the 2nd one from Polar & mioPOD again of a few bpm off. But otherwise, it’s very clean.

And again, the last set is almost identical – super clean minus a single second blip on the interval from the mioPOD:


So, let’s shift interval types – this time over to an indoor trainer workout. Here you can see these 30×30’s, also a beastly difficult test for optical HR sensors. But then followed by some longer duration intervals. Similar cast of characters here on the HR sensor front, got the Scosche R2 of course, but also the Whoop, Polar Verity Sense, mioPOD, and then the Polar H10 chest strap and Garmin Enduro wrist-based watch optical sensor. Here’s that data set:


The Garmin Enduro got a slightly late start – about 30 seconds off the line, and you can clearly see the impact of that for the first minute as it catches up. After that, it’s mostly OK though. Again, a good reason to always start your watches before you start increasing intensity. The Whoop in blue…it’s just doing Whoop best – lost and underwhelmed.

Let’s zoom in on some of the intervals though, to get a closer look at things:


From a Scosche/Mio/Polar Verity Sense/H10 chest strap standpoint, they’re virtually identical. There’s very few times where they aren’t, except the slightest of lag, often on recoveries, of perhaps a second or two.

So then, looking at the longer intervals, as we’d expect, things are quite stable and close-knit there. I mean, minus Whoop of course. It’s always astounded me just how bad that sensor is. An indoor trainer ride, steady-state at a moderate intensity is the gravy train of easy things to nail. And yet it can’t even manage that.


Next is a Zwift ride. This one wasn’t too crazy, just a nice mostly steady ride. Here it is compared to an Apple Watch SE optical sensor, Garmin FR745 optical sensor, Polar OH1 Plus Whoop, and Polar H10 chest strap. Here’s that data:


You can pretty easily/clearly see it’s essentially spot-on the entire time. There’s no variances there from the Scosche.

However, at the very end I throw down a nice sprint to go out on, so let’s look at that:


You can see that the Polar H10 leads the way on responsiveness, which makes sense being a chest strap. After that, we’ve got the Scosche R2 & Apple Watch SE, and then a little bit later the Polar OH1 Plus, followed by the FR745 (wrist-based) sensor. And eventually the Whoop…sorta.

Next, let’s head outside for a road ride – which tends to be the most challenging for optical sensors, due to the vibrations off the road. Though, the further you move up your arm (placement of the sensor), the easier it is for said sensors to get accurate readings. Meaning, wrist is hardest, forearm gets a bit easier, and upper arm is easiest.

Anyway, here’s that data set compared against a Polar Verity Sense, mioPOD, Whoop Band, Garmin HRM-PRO, and a Garmin Enduro watch (optical):


Now, at a high level it appears the Scosche R2 and Polar Verity Sense are very close to each other, and both of those are very close to the HRM-PRO chest strap. The mioPOD starts off identical to those, but then in this export appears to flat-line. In reality, it tracked just fine, but the export file from the app (or, out of HealthKit) is wonky. Unfortunately, the Mio app is mostly a dumpster fire when it comes to getting data out of it.

Wait, did someone say Dumpster Fire? To which Whoop answers: Hold my beer!

As you can see with that heavily drunk green line above, the Whoop strap does what the Whoop strap does best: Not be accurate.

So, let’s focus on the Scosche R2/Polar Verity Sense/HRM-PRO comparison here, and in particular, I want to look at a set of 4 sprints I did, one earlier on and then again later. Here’s the first set:


Now, what we see here is that for each of these sprints, the HRM-PRO quickly picks up the change in intensity, that’s then followed by the Scosche R2 about 2-4 seconds delayed, and then the Polar Verity Sense about 1 second after that. You’ll also notice the wrist-based Garmin Enduro optical HR sensor delayed even further – pretty much missing the kick on these 15-20 second sprints. The Whoop also is delayed (less than Enduro), but doesn’t really rally as much. Here’s a closer look at that:


And this is a perfect example of what I typically see for wrist-based (e.g. the Garmin Enduro) optical HR sensors outside cycling, especially in winter as I am now. They struggle there on sprints. If you scroll back up, you’ll see that for the steady-state portions it was fine. But these very intense 15-20 second sprints just aren’t ideal there. However, the Scosche does just fine, minus the few-second delay we see on optical HR sensors.

This played out again for the later set of sprints. The Scosche/Polar/chest strap all played the parts identical to above. And the Garmin Enduro wrist-based sensor gave the old college try, but mostly missed it. Whoop decided it just wanted to sit off to the side and continue its Tour de Drunk.


Note that for this outdoor test the placement was on my upper arm. That’s where I tend to wear optical HR sensors like this, partially because I then hide it under the edge of my jersey, and partially because I’ve been doing this about 7-8 years and know that’s by far the best placement for accuracy.

Ok, with that – overall the sensor is perfectly accurate for seemingly everything I’ve thrown at it. Sure, you will get a few-second delay in some circumstances, namely short bursty intervals. But the peak heart rate values remain the same in those situations – so from a post-workout analytics standpoint, there’s little impact.

(Note: All of the charts in these accuracy portions were created using the DCR Analyzer tool.  It allows you to compare power meters/trainers, heart rate, cadence, speed/pace, GPS tracks and plenty more. You can use it as well for your own gadget comparisons, more details here.)

Product Comparisons:

I’ve added the Scosche Rhythm+ 2.0 to the product comparison database, allowing you to compare it to various other heart rate sensors – both chest strap and optical bands. Now, within the optical HR band category, there’s basically two classes of optical HR bands: Those that can remember stuff, and those that can’t. In other words, which ones have workout storage:

No workout storage:

– Scosche Rhythm+ 2.0 (and earlier original edition)

With workout storage:

– Scosche Rhythm24
– Polar OH1/OH1 Plus
– Polar Verity Sense
– mioPOD
– Whoop (not main purpose, but hey…)

Most of the ones with workout storage also have other party tricks like heart rate zone display, or added sport tracking information like swimming or port detection, or even HRV features. Point being, it’s not just workout recording, but often other random things. That said, the prices aren’t all that different in some cases, so, I’ve tried to mix and match what I think makes the most sense below. But you can use the database to make your own comparison charts.

Function/FeatureScosche RHYTHM+ 2.0Wahoo TICKR FITPolar Verity Sense
Copyright DC Rainmaker - Updated November 8th, 2023 @ 8:19 am New Window
Product Announce DateJan 10th, 2021Jan 3rd, 2018Feb 10th, 2021
Product Availability DateMar 15th, 2021Jan 3rd, 2018Feb 17th, 2021
Measurement TypeOpticalOpticalOptical
Typical PlacementMid/Upper ArmMid/Upper ArmUpper Arm
Battery Life24 hours30 hours30 hours
Battery TypeUSB rechargeableUSB rechargeableUSB Rechargeable
NFC CapableNoNoNo
HR TransmissionScosche RHYTHM+ 2.0Wahoo TICKR FITPolar Verity Sense
Bluetooth SmartYes (three channels)YesYes (dual channels)
Dual concurrent ANT+/BLEYesYesYes
Analog for gym equipmentNoNoNo
Usable HR data underwaterDepends: If on same wrist, YMMV.Depends: If on same wrist, YMMV.Using swim clip
Bridging ANT+ to Bluetooth SmartNoNoNo
Can record activity in memoryNoNoYes
Additional DataScosche RHYTHM+ 2.0Wahoo TICKR FITPolar Verity Sense
Run PaceNoNoNo
Run CadenceNoNoNo
Run Economy/MetricsNoNoNo
Cycling CadenceNoNoNo
Cycling Power Meter EstimationNoNoNo
Valid HRV/RR dataNoNoNo
Configurable Sport ModesNoNoNo
Displays HR ZonesNoNoNo
Requires Bluetooth Smart Phone for ConfigurationNoNoNo
Firmware UpdateableYesYesYes
SDK For App DevelopersNoNoYes
AppScosche RHYTHM+ 2.0Wahoo TICKR FITPolar Verity Sense
Can show workout afterwardsN/AN/A (No recording)Yes
Can sync files/workout to 3rd partyN/AN/A (No recording)Yes
More InfoLinkLinkLink
PurchaseScosche RHYTHM+ 2.0Wahoo TICKR FITPolar Verity Sense
Competitive CyclistLink

And again, you can use the database to make your own comparison charts. Oh – and yes, I’m gonna pop-out a review of the mioPOD here shortly. As any astute person will have noticed, it’s been in all my workouts the last month or two. My two-second mioPOD review would be that it mostly works fine, but seems to occasionally struggle accuracy-wise. I find the app both disappointing (it doesn’t always seem to record my workouts) and promising all at once (training load and related). And given it’s been out for some 15 or so months, the changes have basically stopped there app-wise. At $99, it’s the most expensive of the options.



Sometimes, if something ain’t broke – don’t fix it. And in many ways, that’s basically the Scosche Rhythm+ 2.0. They took the three things people complained about: Battery life, button accidentally turning on, and strap – and fixed them. They borrowed the button and strap from the Rhythm24, and arguably, the battery life too – also 24 hours. But beyond that, it’s very similar to before. They tweaked the sensor with a more recent custom build than the off-the-shelf build of 7 years ago – which leads to the higher battery life.

And as my testing showed, the minor changes in the optical sensor package made no difference to accuracy – it seems just as solid as before with the original. And I haven’t had any issues with the battery button turning on in my backpack or during transit.

There are very few downsides to this product, though, I’m a tiny bit surprised that they didn’t go with a dual Bluetooth Smart capable chipset, akin to what we see in most newer heart rate sensors these days from Garmin/Wahoo/Polar. It’s unlikely to be something that impacts a huge portion of the population, but given the costs to do so are pretty minor, I’d have hoped to see it. [Update: As of Nov 4th, 2021, Scosche has added via firmware update not just dual-concurrent Bluetooth channels, but three channels! Details here.]

Price-wise, it maintains the same $79 price – which matches Wahoo and their TICKR FIT optical armband. In the case of that band, I never had great accuracy with it, but perhaps I’ll pull it out of the bin and see if things have improved in the last few years with firmware updates. That unit claims a bit higher battery (30 hours), for those that might need it. Both units have the same ANT+/Bluetooth Smart connectivity.

In any event, the R2 is a solid option for someone that just wants a low-fuss offering. Turn it on, it gives you heart rate…turn it off, it’s done. Simple and easy device that’s comfortable to wear – and arguably most importantly: It’s accurate.

Found This Post Useful? Support The Site!

Hopefully you found this review useful. At the end of the day, I’m an athlete just like you looking for the most detail possible on a new purchase – so my review is written from the standpoint of how I used the device. The reviews generally take a lot of hours to put together, so it’s a fair bit of work (and labor of love). As you probably noticed by looking below, I also take time to answer all the questions posted in the comments – and there’s quite a bit of detail in there as well.

If you're shopping for the Scosche RHYTHM+ 2.0 or any other accessory items, please consider using the affiliate links below! As an Amazon Associate I earn from qualifying purchases. It doesn’t cost you anything extra, but your purchases help support this website a lot. Even more, if you shop with TPC (The Pro's Closet), you'll save $40 on purchases over $200 with coupon code DCRAIN40! The Pro's Closet has been a long-time partner of the site here - including sponsoring videos like my cargo bike race, as well as just being an awesome Colorado-based company full of good humans. Check them out with the links below and the DCRAIN40 coupon!

Here's a few other variants or sibling products that are worth considering:

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Thanks for reading! And as always, feel free to post comments or questions in the comments section below, I’ll be happy to try and answer them as quickly as possible. And lastly, if you felt this review was useful – I always appreciate feedback in the comments below. Thanks!

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  1. ty for the review
    just a quickie on your Miopod comment. over the last year, they have squirrelled away some changes eg the FIT export is via the 3dots in the top right corner. the training load and training effect charts are nice, as you say, but the algos come from Firstbeat…so there might be a story on whether any more such features will come from Garmin/Firstbeat. maybe that has stopped development?

    and 123666,82697,122754,23668 – images not showing in gallery on Firefox. would love to know which gallery plugin you use that works equally as well on desktop and amp, even the standard WordPress wones don’t work properly on amp.

    • Ahh, thanks on the #’s – that was a comparison table, but forgot to put the tag info so it would enumerate. Fixed!

      Good to know on the FIT export. I’ve been using HealthFit to sync them out via HealthKit in the meantime.

      As for gallery plug-in, hmm, I’ll have to poke and see.

    • Shane

      5krunner, read your MIO pod review. Waiting on Ray’s too 😀 Had bad luck with the scosche monitors. Ray, you doing a MIO pod review soon? Please

    • Yup, one coming up shortly!

    • Andy

      I’ve recently bought a Rhythm 2.0 and generally happy with it. But when I use it with my Garmin Forerunner 935, the Garmin seriously under estimates training effect. I have read that some people had a similar problem with the Rhythm 24 that was solved by a firmware update. Anyone had this problem with the Rythym 2?

  2. Pavel Vishniakov

    Hi Ray,

    thanks for the review though I’m having a strong deja vu that I’ve seen this same review here earlier (in January).

    Do you know why Garmin doesn’t introduce a similar optical HR strap? I get that it might not be for triathletes, but for others sports it might work.


    In Edge Chromium some parts are not properly rendered:
    “to make your own comparison charts.


    • Thanks!

      Back in January was simply them announcing it, and I didn’t have a post with accuracy details or usage or such. As of today, it’s shipping. Thus, the review. :)

      And thanks on the charts heads-up, I just forgot to put the tag in front of it to have it render out.

    • Elliott Gruber

      Ray didn’t guess, but I would say Garmin probably doesn’t believe there is a market for an $80 optical band that didn’t seem THAT much better than their watches while they have a chest strap at $99. As a current garmin user, I’d be interested in this product for about $40-45 but if accuracy is that important to me, I would probably jump to the full chest strap.

  3. Ned Bowen

    Does the Rhythm+ 2.0 have a heart rate reading floor like how the original Rhythm would not read below 42 bpm?

    Of course, you could have downloaded a special app on iOS and changed a setting on the original Rhythm, but not if you were an android user. Also, the setting would not save if the monitor was turned off, so even borrowing a iPhone did not help. Hopefully you do not have to do that anymore if you want to read your resting HR, and it is in the mid-30’s.

  4. albor renones

    will it survive a 50 cm fall? because my old unity didn´t…

  5. M

    Kudos on avoiding the temptation to do a muscle pose with the strap placement demo shot :)

  6. Rob F

    1) Max/min strap circumference? I looked on Scoche’s site and the Amazon page and can’t find this seemingly simple spec.

    2) The strap attachment looks like it hooks onto standard spring pins (like from a watch) — what’s the width of the pins? I’m wondering if I could get the strap and use it on a watch.

    3) Can you provide dimensions on the charging case? Dimensions in metric, imperial, or gummy bears / oreos is acceptable. It looks very handy and I’m wondering how many different gadgets I can fit in it.

    • Fred B

      Good call out – we will add some band specs to the info.

      Rhythm24 and Rhythm+2.0 band circumference: Max 40cm / Min 17cm

      One thing to think about when reading these measurements, we are looking for optimal performance and comfort. These bands can stretch to larger circumferences, but you want the band tight enough so it doesn’t slide around, but not too tight where you’re restricting blood flow.

      Thank you Ray for your comprehensive review with the added bonus of some laughter, always fun!

      RIDE FAST!


    • Chris

      I got the rythym HR strap today – and the strap at the largest size will barely fit on my forearm – there’s not a chance it would fit on my bicep – which is sad because I’m not that big of a guy (6’1″ – 180lbs). The old scosche strap with the velcro fit fine. Now I’m kinda sad because I was looking forward to this strap and it doesn’t look like it’s gonna work.

    • Chris

      Sorry for the 2nd response. I had tried the Polar OH+ and as other said – the battery life is HORRIBLE – but the strap is super comfortable on your bicep and had no issues going big enough, but I’m not interested in charging it after every other run.

    • alpanian

      I have a normal bicep and tricep and can barely wear it on my tricep. On my bicep it’s way too tight in its biggest length. This sucks, because I have worn the Rhythm+ for over 6 years now on my tricep, and that’s exactly where I want the Rhythm 2. The band does seem better than the velcro one, it’s just missing a few centimeters.

    • Fred B

      Hi Aplanian,

      Please call our Customer Service team, as they still have a few XL bands that they are giving away. These bands will also be available for sale shortly on Scosche.com and Amazon shortly thereafter.

      800.363.4490 ext. 1

      Sorry for the inconvenience.

      Fred B

  7. Bruno Moraes

    Hi Ray,

    thank you for the review. The amazon link for the Scosche (in the comparison table) is pointing to Wahoo TICKR FIT instead

  8. The Real Bob

    I own the Scoshe rhythm +, the Scoshe 24, and the Polar OH+. I think they are all good, I wouldn’t notice accuracy issues at my fitness levels, if it goes up when I bike harder, and down when I bike slower I am sold.

    I think battery life is important as well as another item that I don’t think you covered Ray, but you probably know everything about it and just didn’t write about it. Standby battery life.

    I have found that the Polar OH+ has terrible standby battery life. I will charge it, then take it off the charger and it will be dead a few days later (maybe a week) when I go to pick it up. That doesn’t happen with the Scoshe.

    Its a big drawback of the Polar, to the point that I stopped using it. I do think the Polar is very comfortable, but the Scoshe aren’t uncomfortable, just not as good as the Polar.

    Maybe I just have a defective Polar, but you should check it out and see if your device does the same.

    Thanks for the review.

  9. Ned

    Great review. I’ve really liked the rhythm 24 for running/cycling. Much preferred over a chest strap. I was then surprised when my young sons night time epilepsy alarm turned up with a rhythm 24. Just a shame they don’t a really small strap for him ! We have to pull it over his knee , still works a treat.

  10. Alex


    Is there any rumors on H10 replacement/upgrade?


  11. jason

    Hi Ray, What’s the minimum circumference on the strap? I ask as my 8yo son “needs” a HRM for Zwiftpower results and chest straps are too big. The Tickr Fit *just* fits on his biceps, but if there was something more snug I’d be interested. Thanks.

  12. Steve W

    Apologize if I missed it, but is the charger the same as the original Rhythm+?

  13. Jason

    Man, the one thing that keeps me away from these, and basically all of them now except the OH1, is the strap attachment is fragile. I had the Wahoo and the Scosche plastic pieces that the strap attaches to break on me, it’s a busted system. Polar’s is great, it just snaps in so if something did break you could just replace the plastic piece but even that looks unlikely to break based on the way it works.

    Might be due to being in a very hot area, occasional sunscreen use, etc.. makes the plastic a bit brittle.

    • Fred B

      Hi Jason,

      We fixed this with a new polycarbonate for the housing. This issue affected a very small percentage of our customers, but as we do here at Scosche, we push to deliver the highest quality possible, so we fixed this.



    • Jason

      Hmm.. ok that’s promising, thanks I will probably give it a try, I do prefer forearm over chest straps.

  14. CJ

    The Whoop review sounds like it is going to be epic!

    • Rui Pereira

      The Whoop review is old news. TLDR: worst performing optical heart monitor ever.

    • Paul S.

      I’m a little curious, Ray, why are you still using the Whoop?

    • Because I’m committed to making a video on it. So committed that I’ve been wearing (and paying) for this darn thing an extra 9 months at this point. One of these days I’ll walk into the video and film it.

      (Real-time: I’ve mostly been procrastinating because the nuances of how to shoot a Whoop video is substantially different than a written review. I don’t tend to script my videos, whereas for the Whoop video there’s so much nuance to that to land/nail the delivery perfectly – else I’ll just get a bunch of Whoop ambassadors/sponsored athletes complaining I missed some irrelevant thing in the comments. So, I’ve been slowly putting together my notes on all the things I want to cover.)

  15. Dean Dunn

    Will have to get one when my original Scosche Rythym dies. It’s the only thing that has lasted as my indoor HR sensor. Have had multiple Garmin HR straps and they all died, as I sweat a lot. The additional battery life of the new Scosche will be handy.

  16. Patrick

    Any thoughts on this vs the Polar Verity Sense? It appears that accuracy is a wash, but is one more comfortable than the other? The dual Bluetooth chipset on the Polar seems like a nice bonus.

    • Thomas

      I have the Verity Sense and it’s really good. I haven’t made any comparison tests – simply because I didn’t feel the need to. “Based on feel” the Verity is spot on and responsive too. I have the Verity on my bicep.

      The fit is also great – whereas the Scosche looks a bit chunky to me?!

      So far I haven’t had any issue with the Polar. Also it works great with Zwift (via BT), Kickr Headwind and my Roam bikecomputer.

      Highly recommended!

    • Patrick

      Thanks, Thomas.

  17. MikeD

    So what is the difference between R24 and R2.0?

  18. Patrick

    I had the original Rhythm+ and upgraded to the Rhythm24 two years ago when the battery life of the + was well below two hours. Optical HR bands are so nice for tracking heart rate, especially for indoor training. The Rhythm24 worked fantastically for me as a ‘footpod’ as well. I’m sure this one is also fantastic, but I would definitely recommend anybody that runs on a treadmill to buy the Rhythm24 for a few bucks more for that footpod functionality.

    • I’ve honestly ignored that level of functionality. How accurate do you find it?

    • Patrick

      Better than a footpod for me, but took some time to get there by calibration. You can trick it by altering your upper body movement, but you have to be thinking about it.

      Generally the closer you can get a sensor to your center of gravity AND limit the amount of extraneous movement, the more accurate it is going to be for estimating physical activity.

  19. Nathan B

    Amazon UK link links to the Wahoo Tickr Fit

    • Ahh…ok, I was trying to figure it out, cause it’s definitely mapping to the correct Amazon US one.

      Ouch, that’s a bad Amazon (their side) mapping luck for them. It just maps ASIN’s over. I can manually override Amazon on my side, which I’ll do.


    • Bruno

      I think Amazon UK still doesn’t have it, so when we search for Scosche it shows Wahoo Tickr Fit instead.

  20. Eli

    With hrv data not being useful from this sensor doesnt that impact the first beat metrics Garmin and other devices have on them?

  21. John Tomac

    I don’t see the point to use a separate optical HR sensor. I’ts less acurate than a chest strap an consume more batery.

    When I bought my Fenix 5 I was excited because I could do the workouts without needing an externa sensor. until I realized that the built in optical sensor of the Fenix 5 is less acurate than a chest strap, specially in short intervals. Since that, I only use optical sensor for daily tracking not for training.

    • “I’ts less acurate than a chest strap an consume more batery.”

      Except, it’s not always less accurate. your Fenix 5 might have been, but there’s actually a lot of cases where upper arm based optical sensors are more accurate than chest straps – especially cooler/dryer weather (e.g. the fall), or also cycling downhill or at high speeds, which can often cause erratic readings

  22. LF

    When I started running, I used a Forerunner 230 with a Garmin chest strap. I used it religiously, but even with help, at some point the chafing on the chest was a bit too much and I started getting wounds on it, especially during the summer.

    I eventually bought a Forerunner 645 with the wrist HR measure, which works fine, I think, though even I feel it’s not as precise as the chest strap used to be. Is it worth getting the Scosche Rhythm+ 2.0 as an upgrade and pair it to the watch?

    • Paul S.

      I have a Rhythm 24, which I mostly use with a Fenix 5+ in the winter for cross country skiing. That allows me to wear my Fenix outside of my clothing, which means I can actually see it without having to stop and dig it out from under things. Since I’m a skier (a solid 4 weeks of skiing this past winter, which is average) and a cyclist (last week was the first week spent entirely on the road instead of indoors; it’s too icy to venture into the mountains at the moment), I don’t really have much use for wrist based HR. I use an old Garmin chest strap for cycling because the 24 pretends to be a cadence sensor, which can’t really be avoided (it “helpfully” changes modes on you) and I don’t really want. Every now and then, though, I forget the put on the chest strap, and then it’s just easier to slip the Rhythm on my arm rather than remove clothing to get the chest strap on.

      So if you get a Rhythm, it gives you more flexibility, possibly a little more accuracy, but it’s another thing that has to be charged occasionally and put on before a run. Only you can decide if that’s worth the cost.

  23. Kevin

    Ordering one as soon as I can. I’ve used the R24 for a little over a year now, and while it’s great, the one thing that bugs me is all the extra stuff you can’t turn off. I’d like to be able to set it in the app to HR only, but it automatically switches to “bike mode” (with whatever extra sensors they use for cadence). Every time I have to set up sensors on a head unit I have to make sure I’m connecting to the real cadence sensor, not the strap’s.
    Scosche said they have no intention of changing that. It’s not a deal breaker, but if I can get essentially the same sensor without the extra crap I’m in.

    • tracksmart

      That’s strange. I *did* set it to Heart Rate only in the app. And appears to have stayed there (i.e. I don’t get cadence data from it on my Wahoo headunit nor in my trainer rides). I have the Rhythm 24 and use it on the trainer (connected to laptop via Bluetooth) and on my bike (connected to Wahoo Elemnt Bolt). Cadence from the R24 never appears in data from use case.

      Some thoughts about why it might be working for me in *HR only* mode: Maybe I only told my Wahoo to pair it to the HR sensor (and not a separately seen cadence sensor) so the Wahoo ignores the cadence data? Or maybe it’s because I didn’t set a cadence field at all on the Wahoo? Maybe you use a Garmin or other headunit and those units behave differently when they detect the R24 (i.e. triggering the dreaded “cycling mode” with the extra features). Maybe the Android app has been updated and does a better job of semi-permanently setting it to HR only mode these days?

      Regarding the usefulness of the other features: I totally agree! This newer, simpler version that costs less is probably the right option for most people. The cycling cadence isn’t really worth using (not on the road anyway!) since it is so prone to error. The data storage isn’t that useful for anyone who is already recording their activity on another device anyway (e.g. headunit, watch, etc). Maybe the running cadence would be useful for some people when paired with a fitness watch? But don’t most fitness watches already have some kind of pedometer functionality that would make this redundant?

      I didn’t purchase the R24 for the bike cadence functionality, but I tried it on a lark. It happened to be a gravel bike ride (mix of paved and dirt roads), so kind of a worst-case scenario. WOW! It was all over the place. Especially on bumpy terrain. On smooth terrain, *while pedaling* it seemed okay, but it just made up cadence values when I wasn’t pedaling (even on relatively smooth roads). So yeah, if you want cadence, buy a cadence sensor and attach it to your bike (they are pretty darn cheap). You’ll be much happier. Especially if you ever coast or find yourself on anything that isn’t smooth pavement.

    • Kevin

      For me, if I set it to HR only in the app, pair just the HR to my Garmin, then check it again in the app it’s back in bike mode. Supposedly a feature so it automatically recognizes your activity. I had to tell my devices to ignore the rhythm’s cadence ANT+ id or risk pairing with it whenever I paired new sensors.

    • Fred B

      Hi Kevin,

      This is a function of ANT+ – it pushes the R24 into the workout mode automatically.


  24. gingerneil

    I have a tickr fit… Am I right in thinking that there’s nothing here for me?

    • Pos

      Most stuff works well and you don’t need to upgrade until your unit stops working for you. Some people also have money to burn and so upgrade to the latest and greatest for not much reason.

  25. Matt H

    I have trouble with chest straps because of the way I’m built. I think many have trouble maintaining contact with my skin. Wonder it this would be a better solution.

  26. Fiatlux

    I might be tempted to buy one to replace the two Rythm+… that I lost 😞.

    Still, I find those devices difficult and sometimes impossible to use when wearing long sleeves, which would be my case when running in much of the winter (and more often when cycling).

    Any tip?

  27. cougchick

    For some women, the arm strap is SO much more comfortable and convenient than a chest strap! My daughter and I are both big chested, and both of us absolutely love our Rhythm bands.

  28. Dmitry

    Heh, whoop rocks xD Was it on wrist or bicep?

    • Mostly wear it on bicep, occasionally wrist, but rarely as I’m usually wearing a watch on both wrist, so it takes up that spot.

      Bicep helps a bit with spikes, but it’s still horrendous.

  29. Eric

    Readers should be aware that the strap, while made of a very comfortable material, is rather short. I probably have arms a little bigger than average, but I was very surprised at how snug the Rhythm+ 2.0 band is at full length just around my forearm. And it is downright tight on my biceps/triceps. In comparison, my MioPod long strap is a good length for my biceps/triceps (and with room to go bigger), and I can easily snug it down for the forearm.

    I called customer service, and they indicated that they don’t have a longer strap at this time.

    I wonder if there is a compatible strap from another source. The small clearance for the strap attachment seems to limit options (i.e., my Miopod strap doesn’t easily fit onto this device).

    Thanks for your reviews! This one was nicely done, and helpful.

    • Chris

      Yeah, it says 15” – My biceps are only 13” and it cuts off circulation if I put it that high. That stinks that there isn’t a strap big enough for regular people because I was excited about this HR monitor. I guess I’ll keep using my old scosche hr monitor that goes big enough.

    • Fred B

      If the bands are too small for your massive biceps region, please reach out to the Scosche Customer Service Team and they will send you a large strap.


    • Chris

      Thanks! I tried contacting them 4 days ago and haven’t heard anything back yet – I’ll send another email.

    • Eric

      UPDATE: customer service tells me that they will have longer straps available “in a couple of weeks”, and to contact them later. Great news!

    • Mike Michalak

      They are sending me a larger strap today. It’s crazy how small the new strap is on the 2.0.

      I did an online chat.. had to send a screenshot of my Amazon purchase.

    • Kolesar1

      Hi Mike,
      what is your biceps circumference?
      And how much longer the new strap will be?

      I’m confused by above comments, and response from Scosche:
      – The Rhythm+ 2.0 strap has a length of 9.75 inches (= 24.7cm)
      – Our armbands are adjustable from 17cm to 38cm

      I.e. my biceps is also around 13″ / 33cm, and Chris says this is already too tight, but Scosche told me it would fit.

    • Chris

      You could technically make it fit – but you’re going to stretch the elastic about as far as it will go. The new polar strap adjusts perfectly as does the old scosche straps. It looks like they’ll send a new strap if you can get ahold of someone. I tried contacting scosche and no one would contact me back.

  30. Jan Dvořák

    Hey Ray, not really on topic…
    I have previous gen Wahoo Tickr and my strap is a toast. Could you suggest a replacement strap for me? I have easy and cheap access to Sigma Comfortex+ strap and Polar strap, other ones would be harder to get for me. My main question is, are those compatible? Thank you very much!
    Btw why is Wahoo not offering replacement straps anymore?

  31. Giles Roadnight

    A real shame that you can’t connect 2 different devices to it over BLE.

    Are there any optical HR straps that allow multiple Bluetooth connections?

  32. Eltonjc

    I use the Rhythm24 and find it very great for cycling while linked to my Karoo, along with the long battery life, especially wearing long sleeved clothing.
    I’ve found on rough roads wrist-type HR monitors (watches) loose accuracy, where the mid/upper arm type provide more reliable metrics, especially when cold, but then that’s me.
    Magically the Rhythm24 transmits cadence to a surprisingly accurate degree considering it’s on my arm!!!
    This feature alone makes it handy for jumping on my bikes not fitted with cadence sensors.
    I do hope Scosche have not permanantly replaced the Rhythm 24 with the Rhythm+2, as I was hoping they would release a unit with an SpO2 sensor & skin temperature for future analytics, along with the dual-band Bluetooth support.

  33. Kolesar1

    Hi Ray,
    does it switch off automatically if you forgot to press the button after the workout?

  34. Todd Donovan

    I’ve had the Rythym+ 2.0 for a couple weeks and have used it indoors and out. Connection to the Mac with BT and Ant+ dongles worked great. Outside I used with Garmin 520 on four rides. It worked well on my forearm and above my biceps – but I’m 6’5″ and 172 lbs and the strap is at full length on my upper arm. Could be tight or unusable for more muscular types. Accuracy seems good but I’m returning it because the unit won’t turn off using the switch. I’ve had to connect to the charger to turn it off.

    • Kolesar1

      does it stay on even when you hold and press the button for several seconds?

    • RobertBB

      Uh oh, I had exactly the same issue with mine last night. Wouldn’t turn off with the button – required me to plug it into the charger. I reckon it’s a bug. Is it possible to update the firmware on these things?

    • Kolesar1

      But after that workaround, will it then turn off normally with long press? (without another need to plug in charger)

  35. Joel

    I ordered a Rhythm 2.0 and have used it for a few rides now (indoors and outside). I’m really liking how it fits compared to a chest strap. However, I’m finding that it’s way off for the first 10 or 15 minutes (either way too low or way too high – like above my max heart rate) and then it settles down nicely after that. Is this ‘first 15 minute’ flaw something that would get fixed in a firmware update, or did I get a lemon, or is this just how these optical units work? I’m thinking of returning it and trying the new Polar Verity Sense…

  36. RobertBB

    I just got a Rhythm+ 2.0 to replace my Polar OH1+. The only reason being the woeful battery life of the Polar.

    When paired with my Wahoo ELEMNT bolt, I am unable to get the bolt to tell me battery status of the Rhythm+ (it was able to do so for the OH1+).

    I’m wondering if this has something to do with the connection type – bluetooth vs ant+?

    • Fred B

      Hi Robert,

      The R+2.0 is transmitting battery level/life through both ANT+ and BLE, so I would guess it is the setup of the bolt.


  37. Adam

    Received mine and wow is the strap tight!! I couldn’t possibly wear it for more than a minute or so.

    I have reached out to my local support in Australia, but as they don’t sell the 2.0 here yet (got mine through Amazon), I am a little concerned that they won’t be able to help.

    @Fred B – any advice?

  38. Geoff

    I’m interested in an optical hr monitor to wear with my Apple Series 5 Watch:

    The important aspects are:

    Plays well with my Apple Watch.

    Has solid battery life.

    Don’t care about recording.

    I kinda like Polar, so the verity appeals, but the Schoche Rhytm 24 and + 2.0 do have slightly better battery life.

    I bought a Rhythm 24, but it seems like I have to constantly fuss with it in the morning. Forget it and re-pair before it starts reading.

    I use PAI and the Verity will apparently connect directly to the iPhone PAI app.

    Don’t know whether to return the Rhythm24 and buy a verity.

    I also have a Polar H10 chest band.

    Do you have an opinion if my primary focus is playing nice with my Apple Watch?

  39. Geoffrey Staples

    Tried this once and it didn’t seem to go through. Sorry if it double posted.

    I’m interested in an optical hr monitor to wear with my Apple Series 5 Watch:

    The important aspects are:

    Plays well with my Apple Watch.

    Has solid battery life.

    Don’t care about recording.

    I kinda like Polar, so the verity appeals, but the Schoche Rhytm 24 and + 2.0 do have slightly better battery life.

    I bought a Rhythm 24, but it seems like I have to constantly fuss with it in the morning. Forget it and re-pair before it starts reading.

    I use PAI and the Verity will apparently connect directly to the iPhone PAI app.

    Don’t know whether to return the Rhythm24 and buy a verity.

    I also have a Polar H10 chest band.

    Do you have an opinion if my primary focus is playing nice with my Apple Watch?

  40. TZed

    If the prices were the same, is there any reason to buy the Rhythm Plus 2.0 over the Rhythm24?

    • Paul S.

      If you’re a cyclist, the Rhythm 2 won’t try to pretend to be a cadence sensor, and switch modes behind your back when you pair it to a cycling head unit.

  41. Ravi Abrol

    Great reviews.

    Your review said that R2 can show HR zones.
    Is it using that little area lit blue in pics?
    But the database table says it can’t display HR zones.

    Which is correct?

    Last question:
    Besides rythm24 are there any armbands that show HR zones?


  42. Sergios

    Received mine last Wednesday.

    First run on Wednesday, it was fine for the first 15 mins, then suddenly HR disappeared from my Garmin watch and wouldn’t come back even if I moved the strap around. The sensor was connected with the watch (blue light flashing) just no heart rate reading. I switched on and off, sensor reconnected, HR reappeared but after 5 mins again disappeared… Tried different positions, on the tricep/bicep, tightened loosened the strap, nothing worked.

    Same story on a walk on Thursday.

    Anyone had similar issues? Any fixes?

    (I also had issues with the device not switch off as other people reported)

    • Sergios

      An update:

      After another 3 runs with very unreliable readings with the strap on my tricep/bicep (HR constantly dropping and reappearing in two of the runs and in another one dropping and never reappearing), I decided today to try placing it on my forearm after I read @Eric Schneider’s reply in another post. It worked great, didn’t drop once (although my arm was red by the end and a bit numb, perhaps I overtightened it :-) ) . Hopefully this is the solution! Thank you Eric.

  43. David Watson

    I just submitted a warranty claim on my Rhythm+2.0 that I purchased in late March. It often shuts down on its own during an activity, or won’t turn on, or turns itself on sitting on the counter and drains the battery. I can never be sure it is going to work. I have read the instructions and I am using the device correctly (and I am a tech guy). Very disappointing!

    • David Watson

      Got my warranty replacement and still having problems. The Rhythm won’t reliably connect and stay connected to my Garmin Edge 1030. It will display my heart rate for awhile, then it will go blank even though the blue light is still indicating it is connected. Other times, it will stop reporting and I’ll look and it has shut itself off. Occasionally, it will not turn on when I push the button, and I have to put it in the cradle to reset it. I really want this thing to work, but it is currently not reliable enough to replace my Wahoo Tickr chest strap. I’ve ended up with multiple workouts with no heart rate data. I hope an eventual firmware update will improve the situation.

    • Fred B

      Hi David,

      Are you able to test if this is happening when connected to other devices or apps?


    • Fred B

      Hi David,

      One more question – are you getting heart rate data before the Rhythm shuts down? The reason I ask, we do have an auto-shutoff if the sensor isn’t receiving heart rate it will power off after a few minutes.

      If you are losing HR prior to the device powering down, you might double-check the placement of the device, making sure it’s over the muscle (forearm, triceps, biceps), the band is tight enough to not allow external light to get in, but not too tight to restrict blood flow.



    • Jon Niehof

      I’ve been having all sorts of trouble with the 2.0 that I didn’t have with the original, frequent dropouts for up to 5 minutes. Paired to Fenix 6X Pro via ANT+.

      Sean from Scosche support suggested using BT because apparently they’ve got an ANT+ connectivity issue with Garmin (!) BT seems to be working for me for now…hope this helps somebody.

  44. San


    I had the R2 for over a month tried wearing it on the forearm and just above the elbow but the readings are too unreliable. It is paired to a Vantage V and numerous times when I start to jog within 5-10mins it would show my HR as above 180 at a very easy pace, compared to H10 I could be going all-out sprint and I wouldn’t be able to increase it beyond 165.

    Has anyone else experienced similar issues with their R2?

  45. TZed

    regarding battery life, I charged it fully and now have 8.7 hours of actual activity. I recently received a notice on my watch saying the HR monitor battery was low, so I opened the app to find roughly 50% battery listed, just now I turned it on again to check in the app and it listed 40% battery remaining.

    First off, it’s annoying to be told battery life is low at 50, or even 40% remaining. Second, this is a very far cry from 24 hours of battery life advertised.

    Does anyone else have any info on battery life on their units?

    • Eric Schneider

      I feel like I’m getting about 12 hours of use before “low battery” alert on Garmin. However, I haven’t had it die completely on me. If you are correct about the app, it might still have 40-50% remaining, in which case the total time gets close to 24 hours.

      I figure an upcoming 12 hour endurance event will be a chance to test it. It should last that long without any problems.

    • TZed

      I am now at 14 hours of activity and battery shows as 16% which works out to about 6% drain every hour, it should be draining close to 4% an hour. Maybe I got a poor quality unit?

    • Eric Schneider

      I just did a 12 hour activity, wearing the Rhythm+ 2.0 the entire time, not turning it off, not changing placement, etc.
      I charged my Rhythm+ 2.0 immediately before the activity.
      I got a “low battery” indicator on my watch at 11 hours 55 minutes of use.
      I do not know how much actual use remains,.

    • TZed

      That’s pretty good, I think I have a lemon. I did two days on a cycle tour, it lasted under 12 hours between two activities before dieing completely.
      I’m returning it shortly

    • Fred B

      Hi Eric,

      Yes, we have seen a wide range of low battery messages from different watches and cycling computers – ranging from 50% to 20% battery life when alerted.

      12 hrs – sound like a good day out!!


  46. Geoff Staples

    Both the Rythm and Polar Verity, when connected to my Apple Watch, show the heart beat, but don’t move the Activity Exercise ring, even when I have an active exercise going.

  47. Fred B

    Two quick updates:

    We are looking into the issue of the R+2.0 not powering off. If you have this issue, please place the sensor on the plugged-in charging cradle for at least 60 seconds, this will reset the processor and we are seeing the device return to working normally.

    Currently, we are developing a new firmware version that will change the current single BLE connection to offer three BLE connections. This will help as many customers are having difficulty connecting due to the Rhythm still being connected to a device that they are unaware of. Look for this update later next month.


    Fred B

    • RobertBB

      H Fred, any known issues with the Rhythm+ 2.0 not feeding its batter status to a wahoo bolt? I used to get this info from my polar device but the wahoo seems to not be able to get the info from the Scoche.

    • PGrey

      @Fred B
      I have this problem, running the 1.xxx.18 firmware.
      I’ve had to use the charging cradle twice now, in the three weeks I’ve owned it (holiday replacement to my battery-dying R24 ;-]).
      One of the times I couldn’t turn it off until later that evening, when I’d returned home, it just ran on, and I left it sitting in my helmet (I was afraid to put it in the ziploc I have for it and the strap, in terms of potential heat issues).
      I see that there’s a 1.xxx.21 update, is that the one that fixes it?
      If so, how can I download/install it, if I don’t have an iOS device?
      I’m actually a s/w engineering professional, just one who despises the iOS walled-garden mess, even if they make decent devices, and I started my coding way back on the 6502… ;-] I don’t see myself purchasing an old iOS device, just to upgrade my R 2.0.
      Surely your engineers use a PC to deploy this, via BT or USB, maybe I could use that method, if it were exposed for users? I’ve done some firmware dev/debug, way back, and lots of device-test specifics, so I’m plenty comfortable chasing such issues around.

    • PGrey

      I should clarify, I’ve had to use the charging cradle twice to TURN OFF the R 2.0.
      No amount of 3-4 second presses would do anything; I even did a couple of times 15 and 20 second pushes, but to no avail.

  48. Matt P


    Had my unit about 2 months now, I can turn it off and on no problem but the main problem I find is that when I start my run it shows my heart rate @ 170/180 for about 10mins!!??

    It then settles down, it’s really annoying as it’s messing up all my training feedback from my Garmin (I used to use the HRM but had chaffing issues after using a HRM for about 5/6 years)

    I do find the rhythm+2.0 very comfortable to wear but readings are way off at first (using Garmin 945). I wear around my tricep will try my forearm.

    On another note I was wearing it when I had my blood pressure taken @ hospital for my vaccine and it gave the exact reading as the scosche app shame it goes way off when I run with my Garmin watch!!

    • TZed

      I’m having the opposite problem, it is starting out at 50bpm and it takes a long time to snap out of it and show real readings. Even if I do intervals during that period it will show reading from 46 to 60

    • Fred B

      I have seen this, but only when the sensor lenses are dirty/salty from a previous workout. Make sure to clean your sensor after a good workout. Even whipping it with your thumb seems to help.

      If you continue to see these issues, try placing the sensor in different places – upper arm biceps or triceps – over muscle provides the best performance.


    • Matt P

      Hi Fred,

      I’m still getting issues my last 3 runs still show crazy high heart rate at the start then it settles down?

      Today I did intervals so easy 10 mins @ 9min mile then 5 mins intervals @ 6.10min mile pace.

      I looked @ my Garmin when I had it connected it did show heart rate @ 65 then as soon as I pressed start recording on my Garmin 945 it just jumped up really high for about 10 mins.

      You might see my heart rate reading in picture but it happens all the time? 😢

    • Fred B

      Hmmm, that is strange. Stay tuned, I’m reviewing this with the team and will get back to you ASAP.

      Thank you!


    • Fred B

      Hi Matt,

      Question for you – is the Garmin 945 HR sensor turned off and the only HR sensor the 945 is paired to is the Rhythm+2.0?



    • Fred B

      That picture was supposed to be my profile picture.
      Our new campaign – Stop Licking Your Chest Strap.


    • Matthew P

      Hi Fred,

      I have Garmin 945 HRM sensor turned on, I always check under sensors if scosche is connected to my watch which it is paired and connected when I switch it on. I think it must be reading my HRM from my Garmin 945 until I obtain a gps signal and press start.
      I look @ my app before I run and can see heart rate reading from scosche so I know it’s working.
      I leave the phone @ home.


    • Fred B

      Hi Matt,

      Please try turning the optical sensor off on your Garmin and then pair the Rhythm to the watch, as it sounds like the Garmin is jumping from its optical sensor to the Rhythm and causing you these issues. Leave that Garmin HR sensor off during your runs when using any 3rd party HR sensor.

      Let me know how it goes.


      –Fred B

    • Matt P

      Hi Fred,

      I did as you suggested and turned off Garmin wrist HRM unfortunately i still had same issue.
      When I started my run my heart rate was 70 but just keep going up! Then sorted itself out after 1.5miles

      It was just a short easy run today😀

      Any ideas?



    • Fred B

      Very strange. We are reviewing other possibilities – stay tuned!

      Thanks, Matt!


    • Eric

      I’ve had this happen a couple of times also–a HR that goes up and up and up when I am not working that hard. I have to take the sensor off, let the watch register HR of “–“, then put the sensor back on.

      This has happened with another optical sensor and with the Garmin watch alone. I thought maybe this is something inherent to optical sensors? Or something environmental?

    • Matt P

      Hi Fred,

      Hopefully it can get fixed as it keeps happening 😀😀



    • Matthew P

      Hi Fred B,

      Any update? Still having issues with way to high Heart rate readings!
      Today I went to the running track and it had a crazy high reading before I even did my intervals! 😢



    • San

      Hi Matt P

      I came across this while looking into why the R2 spikes within the first 10 mins link to fellrnr.com

      Granted it is the original Rhythm, but I don’t think the sensor has changed between the original and R2

  49. Jim Robertson

    I’ve had FOUR Rhythm24 strap attachment point fractures. The manufacturer sent me replacements 3 times; the last was almost 2 years ago. Two days ago, the fourth case strap attachment point snapped!

    I called tech support, and they claimed the defect has been fixed, so I’m ordering a Rhythm 2.0 (my Garmin 1030 does everything else I need it to when paired to cadence and speed sensors). I’m hoping I don’t destroy yet another monitor case. I’m a little guy, so it’s hard to believe I’m over-tensioning the strap, although in every case the fracture occurred as I was removing the device from my forearm.

    • David Brodmann

      I’ve had same problem with my first Rhythm 24, plastic broke where strap attaches after about 6 months. On the replacement unit, the battery died after about 6 months, but I also noticed the plastic was developing microcracks. So I’m on my 3rd now, will see how this one goes. I’m trying to be as careful as possible putting strap on/off.

    • Same thing here guys. Easily broke the plastic on the main unit where the little tiny metal bars attach. After braking 2 units in only 6 months literally because if flexed or tensed my arm while biking, I opted to let the unit rot and stopped using Scosche unfortunately because I loved the accuracy of the unit. I’m looking at the Polar Verity Sense now finally as a potential replacement even with the known HR time delays on intervals and higher cost, solely because this frustrating issue with the Scosche breaking so easily if I accidentally flex or bend an arm while using the strap. The brittle/flimsy tiny plastic attachment points shouldn’t be so easy to break with a simple arm muscle flex on a strap that adjusted comfortably. I don’t have that big of forearms – I’m a cyclist/trail runner!!! Scosche has been a major disappointment/design failure because of this issue. I also couldn’t ever trust it for a significant run or race knowing how fragile the devices are.

  50. gingerneil

    Anyone else find that the ant+ broadcast on this is awful? I have it paired with my 945 on the opposite arm, but if I have the Scosche on the tricep, it continually drops out. Pull it round to the bicep and its better, but not great. BTLE seems solid though – but not impressed with the ant+. For comparison, I always used the TICKR FIT in the same place with ant+, and it was absolutely fine.

    • Sergios

      Mine also keeps dropping.

      I have it on my upper forearm and the watch is on the opposite arm…

    • Fred B

      Quick question – are you both running the 945 watches? Do you have another device (maybe a bike computer) to pair the Rhythm to and see if you are having the same issue?

      Our Rhythm’s use the same internal antenna for BLE and ANT+, so if there’s an antenna issue you would be having dropouts with both BLE and ANT+. You can test that as well.

      Let me know.

      Thank you!


    • Sergios

      Fred thank you for the reply.

      I am running 735xt, so no BLE only ANT+.

      Today I tried having the watch and sensor on the same arm and had no dropouts! Hopefully this is the fix I was looking for, let’s see…

    • Sergios

      I just want to report that the sensor has performed well consistently, since placing watch and sensor on the same arm.

    • Fred B

      We are investigating this issue. Others have reported this happening with Garmin watches and those same users have tested this when paired to other devices, e.g… cycling head units, which didn’t have any dropouts. So, it could be a Garmin issue.

      Let us know if you are seeing similar results.



    • Richard Jerome

      Same here – 945 with R2 on opposite tricep regularly drops out on ANT+. Seems bulletproof on the BLE though. Was expecting more to be honest – ANT+ on my old R1+630 was reliable. Makes me think it could be 945 related, but my 945 is fine with my Stryd and that’s further away than my other arm!

    • Sergios

      An update: after 2-3 months of the sensor working fine, in the last 2 weeks it drops on all of my runs (even though I have not changed the placement) and then does not reconnect.

      I have to say, this is quite disappointing.

      Also, after 5 months of sending a message to Scosche Europe I still have not received a reply…

  51. Kent

    So I’m a mountain biker that occasionally wears elbow pads, that are essentially neoprene sleeves that cover from my bicep to my forearm. I would have to wear the Scosche underneath the elbow pads. It seems like that would be good for the optical sensor, but will that turn the HRM on/off or is that an unlikely occurrence? I’m not 100% clear how the on/off mechanism works. If the on/off button is depressed from the rest of the HRM monitor it shouldn’t be an issue, but if it sits proud of the rest of the HRM, then it may be. Any info would be helpful as I’m tired of wearing a chest strap.

    • Jim Robertson

      You need to press pretty firmly on the power on/off button to toggle it, so I doubt that a compressive circumferential pad would interfere. The heart rate is monitored by an LED that interacts with changes in skin color caused by the heartbeat and pulsatile blood flow.

    • Kent

      Makes sense, thanks for your reply. I’ll give it a try then. Thanks!

  52. Velin

    Hello, I want to ask is there low battery indicator or we have to charge it every time before training?

  53. Pamela

    Need the most reliable heart rate monitor out there for an athletic teen who’s emphasis is track – 100 and 200 meter races, soccer, and working out/ weight training. Teen recently had 3 heart ablations to fix SVT (where heart races at times up to 240’s+). Prefer the armband idea. I don’t think a watch or fitbit will be accurate enough? Teen won’t wear a chest strap. Looking for accuracy, and alerts or on the spot ability to see heartrate. So, for example, when finishing a race, need to be able to check heartrate immediately or an alert if heart is racing at 200 or above. Access to a phone is limited when at track meets. Also, need to be alerted if heartrate randomly starts to race when not active.

    Which product do you recommend? Willing to spend for the right product to give us peace of mind.

    • Pamela

      Sorry, one thing to add… would be nice if data can be shared with his cardiologist. Or, ability to take screenshots before data expires… possible solution?

    • Fred B

      Hi Pamela,

      I would recommend the Rhythm24 with the ability to customize the device to your specific heart rate zones. Once programmed with the Rhythm Sync app, the LEDs on the Rhythm24 will change color for each zone. So you could set it up with a max heart rate of your choice where it would blink red alerting the person wearing it. While at the same time, as long as the phone is within 100ft, you could see the HR number being transmitted via Bluetooth or ANT+.


    • Pamela

      Thank you so much! That’s very helpful. We have one being shipped!

  54. arthuroo

    A quick question in relation to HRV.
    It was mentioned that the sensor doesn’t support the metric, however does it send the R-R intervals in msecs to a connected device e.g. via Bluetooth to an App?
    I’m going to use it for rest and recovery only and the App will calculate more advanced stats like RR, HRV or SDNN, etc.
    (unless there is a better optical HRV sensor on the market)

    • Fred B

      When the Rhythm24 is set in HRV mode, it does measure and transmits the RRi. You can also record in HRV mode, but need a special app like Runalyze to show data – screenshot here:

    • arthuroo

      Many thanks Fred, this is exactly I’m looking for

    • arthuroo

      what are the supported iRR max/min values? I have been using the sensor for a while. Point taken, this isn’t a medical device, but I don’t find some results consistent or my fitness level is better than I thought :)

  55. Rob_NZ

    @ FredB
    Is there a reason why we have to apply to support for a longer armband?

    Why doesn’t Scosche simply doesn’t offer your larger size armbands for the Rythym + 2.0 and Rythym 24 in your store along with the regular ones?

    • Fred B

      Hi Rob_NZ!

      We have an XL band that should hit Scosche.com within the next week. Band length adjusts from 21cm to a max of 37.5cm. This is great for upper arm placement.

      Thanks, Rob!

      –Fred B

    • Rob_nz

      FredB – Cool! Thanks

  56. Simon

    I have had my R2 for a few days now. I agree with most of the comments about the strap length. I don’t have big arms but the strap is on full extension for upper arm placement. Also when paired to my edge 830. The connection is not great. It will drop and then reconnect, I can see in the trace there are (very) short gaps. I’ve tried different placement on the upper arm but nothing seems to affect it.
    Also it will not turn off. I have to put it in the charging cradle to stop it.

    I’m hoping for a sorfwatr update soon or it may go back.

    • Fred B

      Hi Simon,

      SW update coming soon to fix the issue of not being able to turn off. When you place the Rhythm on the charging cradle it does reset the processor within the device and sometimes completely fix the issue and sometimes it doesn’t – strange one, but we have a fix.

      The dropouts are strange with your 830. Are seeing dropouts when paired to other devices?

      Anyone else seeing issues with the Garmin head units?

      –Fred B

    • Kent

      I’ve had my R2 for a few months now and connect to a Garmin 830 via BLE and I haven’t had any issues with dropouts at all, I’ve been pleasantly surprised by how well it’s worked and tracked my chest HRM.

      I wear it on my upper left arm, and on the app it says Rhythm Version: 1.015 if that helps.

    • Simon

      Hi Fred.
      It’s the Ant connection with the 830. I did a test run with Strava android on a quick walking into the city and the data was good so changed over to bluetooth on the 830 as well. Only had a 1hr ride but again no dropped connection and the data looks solid.
      Thanks for the info about switching it off. I’ll keep checking for the sw update.

    • Simon

      Hi Fred.
      It’s the Ant connection with the 830. I did a test run with Strava android on a quick walking into the city and the data was good so changed over to bluetooth on the 830 as well. Only had a 1hr ride but again no dropped connection and the data looks solid.
      Thanks for the info about switching it off. I’ll keep checking for the sw update.

      Kent, I also noticed with the Bluetooth connection, where I positioned the r2 didn’t really letter, just worked so clearly its the Ant rather than the position. Thanks for for the comment

    • Justin

      I am having the same issue with my Wahoo as well. ANT+ connection keeps dropping out. no problems when connecting with BLE to the strava app or the Scosche app. Same problem with the ANT+ connection to my Garmin Fenix 6X.

    • Tim VH

      I have the unable to switch off issue as well. At first putting it on the charging cradle helped to turn it off, but now the monitor doesn’t work at all, just get one dull green light on the underside instead of the usual bright flashing lights. My original Rhythm+ is still going after several years, but the Rhythm+2.0 is no longer working after 4 months (less than 30 rides).

    • Tim VH

      I don’t see how the firmware update will help as my R2 no longer pairs with the Rhythm Sync app or my Garmin (it turns on and off, but nothing happens other than than the one dull green light). Still waiting for a response from Scosche after putting in a contact request.

    • Kent

      Cool. Happy to be helpful and glad to hear you got it working with BLE.

    • Tim VH

      Replaced under warranty, thanks Scosche.

  57. Merlyn

    Any update on the “refusing to turn off” bug? Mine does this every single time, and the only time it worked normally was right after I let the unit totally discharge, then left it on the charger overnight. It turned off normally the first time after this charge cycle, but then went back to me having to put it on the charger to turn it off. I am using only ANT+ link, and not BT. It appears to be stuck in “pairing mode” indefinitely, which is probably the source of the firmware bug. As a BT device designer, I always design a 30s to 60s timeout on pairing mode. This saves battery life and avoids accidental pairings. My guess is that your firmware is ignoring the press-and-hold function while it’s in pairing mode.

    My only functional complaint is that it tells my Garmin 520 that its battery is low way too early. I got a warning after about 8 hours of riding over a week, and decided not to charge it yet. It kept going for another 10+ hours of riding. If you can configure this in firmware, I’d recommend a 25% battery life warning, not 50%.

    Otherwise the HR sensor has been great does a great job of tracking HR during short intervals. My previous Wahoo Tickr would not track on 1-2 minute sprints, showing me 130-150 or so. This was probably because I was gripping the aerobars pretty hard and reducing bloodflow through my forearms. Immediately after the interval the Wahoo would spike the HR back up to reality (180-190 range). The Rhythm 2.0 tracks the 180+ HR during the interval accurately.

    • Fred B

      Hi Merlyn,

      Strange to hear that your Rhythm is having this issue every time, even after resetting the Rhythm on the plugged-in charging cradle. We just launched an iOS Rhythm Sync update with a firmware update that includes a fix for the powering off issue, but yours might be a unicorn. So check and see if the new firmware fixes it and if not, you might have a hardware issue. Please contact Scosche’s customer service if the firmware update doesn’t solve this and they will send you a replacement sensor with your returned unit.

      Let me know how it goes.

      –Fred B

    • Todd Jenkins

      Hi Fred, thanks for the reply! I updated from 1.015 to 1.018, and did a few power on/off cycles. The first 3 times it turned off normally, and the 4th time it stays on, regardless of ANT+ or BT link status. So I put it on the charging cradle to reset it, and tried the power cycling again. Twice it worked normally, the third time it stayed on. So it still appears to be doing it randomly. I’ll contact customer service for a replacement.

  58. Giles Tyrell

    I’m also experiencing the failing to turn off bug. Have updated the firmware via the app but hasn’t changed anything

  59. Clyde S. Dale

    Thanks a lot for this reveiw Ray!

    Like all your reviews: extensive, detailed, useful, professional, transparent and with a good sense of humor. Guess that’s just the way you roll! ;-)

    I will now definitely upgrade from my years old, battle worn Rhythm+ to the new one. But one question (and apologies if I’ve overlooked it) remains for me: is there any function of the top LEDs to show the battery life? My old Rhythm+ got pretty weak by now and I just never know how much juice is left in the darn thing! Frustrating.

    @Fred B from Scosche: If you read this, do you happen to have some old Rhythm+ cases/shells available? On my wifes unit the pin right where the band attaches, broke away. The unit itself should be still ok, but ofcourse it’s now anyway rendered useless, without a band on it. If I just could get my hands on the case/lower shell, I could revive it. Unfortunatly, there are no defective units offered on the second hand market to salvage for the casing… I wonder why? ;-)
    BTW, good move to the watch-like-pins on the new one. That should remove such issues completely. Well designed!



  60. Matthias

    Hey Ray,

    Based on your review I bought this HR strap as my sweat eats through normal HR straps like there’s no tomorrow. I was wondering at what position you were wearing the Scosche HRM+2.0, as I am experiencing constant dropouts when I use it in combination with both my Fenix 6 and my Suunto Traverse.
    Or if you have any other tips in getting such clean files?

    Unfortunately Scosche support did send me a warranty replacement but it suffers from the same issues. And when I asked for my money back they never responded so I guess I better make the best of this less-than-perfect strap as I’m stuck with it.

  61. Fred B

    I wanted to share a note regarding a Garmin/ Rhythm+2.0 issue that has come up a few times here.
    From Owen:


    I found out where I was having the problem and thought it might be useful to other people having similar problems.

    The timing of the “disconnect” was happening between intervals in workouts. So I just noticed it happens after exactly 5 minutes and exactly 5 minutes before the end in all my workouts since starting the “garmin coach” program.

    And this is purely a gamin thing, specifically the forerunner 245.

    Now that this has been resolved, I am very much enjoying the Rythm +2.

    Thanks again.

    Thanks for sharing Owen!


  62. Pam

    Worked fine for first couple of weeks but def has not stay charged for 24 hours. I use it with Peloton and if i move my arm off the handlebars – i lose connection – very annoying…

    Issue now is it will NOT power off no matter what i do EXCEPT after 30 minutes of trying, i snapped it back in charger and then tried it and it turned off – this was after a full charge so not like the battery was low when issue occurred. One night, after trying for a long time, I left it and it just stayed on all night and then couldn’t use it when i wanted to as it was out of juice.

    Doesn’t need firmware update (downloaded the app in desperation). Tried calling customer service and another line for quite some time but nobody picked up (was cognizant of PST).

    • Fred B

      Hi Pam,

      Sorry, you are experiencing these issues. Regarding the powering-off issue, please update your firmware using the Rhythm Sync iOS app. This update fixes that issue for the majority of people experiencing this. There is a hardware issue that has the same won’t power off symptom but is extremely rear. If the update doesn’t fix this problem for you, Scosche will replace your unit. Please call Customer Service at this number: 800 363 4490 x1

      We have heard similar complaints with the Peloton bike dropping the Rhythm connection. After researching, it seems to be a Peloton issue and not a Rhythm issue.

      Sorry for this inconvenience.


    • Sergios Agapiou

      Dear Fred,

      And how about the Garmin Forerunner 735XT dropping the ANT+ connection? Is this also somebody else’s issue? I have used my Garmin with 4 different ANT+ sensors (footpod, power meter, 2 different chest straps) never had such an issue.

      By the way after 8 months, I still have not hear back from Scosche Europe. I just gave up and realized that I lost my money. Really disappointed by your product and customer service


    • David Brodmann

      I’ve been having this same problem with Rhythm 24. It’s at version 4.016, is that the latest version? When I turn the unit on, sometimes the lights respond normally, other times it goes to a constant red light and I cannot power it off, except by connecting to charger and then try power up again.

  63. Bknudsen

    I’ve been using the Rhythm 2.0 for well over a year. It had been working really well but more recently it has started cutting out on my Garmin 1030 headunit. When connected in Bluetooth, it drops completely and then the Garmin makes a bunch of beeping noises and eventually it reconnects, only to drop again. This seems to go on endlessly. With Ant+ it connects, seems to work for a while but then all of a sudden the HR display on the Garmin goes blank. After a short period of time the HR reappears but after a while it drops again. This will continue to go on throughout the ride.

    I’ve updated my Rhythm 2.0 to the latest firmware and my Garmin 1030 is also up to date. My Garmin is not dropping other sensors like Powermeter and Wheel Sensor.

    • S. Savkar

      I am having the exact same issue with a brand new Rhythm 2.0. I actually had a Rhythm24 that was exhibiting this behavior which is why I “upgraded”, but now I am thinking there is some software glitch generally in one of the updates for the Rhythm generally. It is driving me completely crazy.

    • Emerson Kent

      I have a similar issue both using via Ant+ (Connected to wahoo head unit) and also using Bluetooth on a Mac within Zwift that after an amount of time that it seems to just switch off or not broadcast HR data until I switch off and power the HR strap back up. Its very annoying, especially when it also turns off my Wahoo fan mid session…

      Any suggestions on how to resolve this would be greatly appreciated. I have a Polar OH1+ and the Polar Verity and have never had issues with either of those. I only purchased this for the extended battery life but so far I am regretting the purchase.

    • Fred B

      Hi Emerson,

      Sorry for the issues you are having – I hate it when that happens. We are doing some final testing on a new firmware update that will fix these dropouts. More to come soon.


    • S. Savkar

      Aha, so there was a software glitch introduced?

  64. Looking for that charging case but it is out of stock for shipping to the Netherlands.

    This is a perfect solutions for all sensors, everyone in there own pouch and charged or charging.

  65. Andrew Reid

    Bought one. It worked great for a couple months. Now the signal drops constantly. From what I have read online along of people have had this problem.

    • S. Savkar

      Yes something has happened with maybe a software update. Has made my Scosche essentially unusable and I switched to a TICKR fit because of it.

      Frustrating as I used the Scosche for several years flawlessly.

    • Bob

      Contact Scosche, there’s a good chance they will help you out I think.

    • S. Savkar

      I previously did. They are a bit confused on their side as to the issue. I have heard some suggest there is a fix coming, but they haven’t fully clarified this with their tech support people whom I spoke with. In any event, the Wahoo TickrFit is working where they Scosche is not. I can’t wait months for this to be resolved. Bummer though, loved my scosche before.

    • Jimmy Lai

      Are you having the issue just on a garmin unit?

  66. Julian

    Does the Scosche connect to Samsung Galaxy Watch 4? When I run on the LifeFitness treadmill – I sync my watch for heart monitoring.

  67. Jimmy Lai

    Well I’m on my 2nd warrantied unit and it still disconnects from my garmin edge 530 randomly throughout the ride. My 1.0 still works flawlessly but it just has a short battery life now unfortunately. I hope they update this soon or I’ll just have to try another product because it is driving me nuts during a ride.

  68. Q

    The SCOSCHE makes maybe the best hardware but creates very … software. The Rhythm Sync cannot be installed with IPAD pro which is my main device for using ZWIFT. So I can only use Rhythm Sync with my Android phone.

    This is not a big deal. The actual problem is if I do not pair any ANT+ devices such as Garmin FR935 or Edge1030, just connect to IPAD pro to run ZWIFT, and everything is perfect. But since I pair using ANT+, the data keep dropout every 10 to 20 minutes and dropping for around half minutes. This is very annoying, I can confirm I wear it firmly, set everything properly, firmware is up to date, but still have dropout issues.

    Also, I checked the Amazon reviews, and many people on the same boat.

    The Rhythm itself is really great, very accurate and responsive, but data dropout is kind of…Somehow, changed to Polar Verity. Even Verify is less response than Rhythm but it almost never lost the data.

    • Fred


      When you say dropout, are seeing it drop to zero, or no heart rate, or dropping from 140bpm to 80bpm, knowing that your heart rate is still up at 140bpm?



    • Andrew

      I’ve had both happen. It usually drops the signal completely but sometimes it just drops really low.

    • R V

      Any update on the dropout issues?
      Is there a new version of firmware for the Rhythm+2?
      My R2.0+ is at 1.018 – is there a newer version?

    • R V

      I previously had bought and used a Rhythm24 but found it unreliable in one specific setting. When worn under layers (in rain or cold weather), the R24 would show false HR readings in the 220+ range. I verified that these readings were spurious by wearing a Polar ECG style (H10) chest HR strap (along with the R24) on a subsequent run. The R24 clearly was showing garbage HR data.

      I plan to try the same experiment with the new R2+ (just got one yesterday); I’ll report what I find. If it is similarly broken, I’ll return it to Amazon – this is why I bought it on Amazon.

      Fred: what do you think I’ll find? Any customer reports? Any known “fixes” in the R2+ compared to the R24?

    • Fred B

      Hi RV,

      New FW will be out this week to address the majority of the dropout issues we are seeing.

      Happy Holidays!


    • I have the same issues with chest straps. Garmin, Suunto, Polar, Wahoo…Latest is the MyZone MZ3 rechargeable 150euro strap. When used it with multiple layers of technical clothing, they crap themselves. Maybe I should go with the Polar Verity Sense as apparently the strap itself is an amplifier antenna ?

    • Fritz W.

      Hi Fred B,

      What version is the new FW? I recently updated to 1.21 and dropouts continue (or unfortunately may be even worse from 1.18).

    • Fred B

      Hi Fritz,

      Yes, 1.021 is the new FW. What device is your R+2.0 paired to? We have seen issues with Garmin dropouts, not a Rhythm drop but a Garmin.

      Sorry to hear you are continuing to have issues. Let me know. Also, check your R+2.0 placement, where you are wearing it, and how tight the strap is.


    • PGrey

      I’ve also got multiple instances of this, on my new (see my other post about not being able to turn it off, without the charging-cradle) R 2.0.
      This is all on the 1.xxx.18 firmware, so far, as I don’t see any updates for it, on the Android version of the app (not sure I quite understand why there isn’t feature-parity here, after all these years…)?
      I see on another forum where a user saw this, and it was pretty solved, with the 1.xxx.21 firmware, so I’d sure like to give it a go, if I can only figure out how to get there?

    • Jon Niehof

      How do we get the 1.021 firmware? The app isn’t showing an update option from 1.018

  69. Hi Ray,
    If today, you had to choose between optical armbands, what would you go with ? Scoche+ 2.0, Verity Sense or maybe other ?
    I am having a giant issue with chest straps all the time. I use all kind of t-shirts, like with silver tissue in it, highly static tissue and a softshell over it, maybe a gore-tex layer. Chest straps somehow always craps themselves on the most important workouts.

    I use the HR not only for training measurements, but for guidance of aerobic activity so accuracy in a 5 beat range is quite crucial.

    Thanks for the answer


  70. Jimmy

    Well an official response from garmin on their forums about this device.

    “After investigating these reports, we were able to determine that the dropouts present from Scosche HRM sensors are due to this particular HRM’s method of handling false or missing data which is resulting in gaps in the activity when recorded on an Edge device.
    Trying to wear the HRM in a slightly altered position or more tightly (if comfortable) would be some troubleshooting that may prove useful. For any users that continue to see this behavior, we would recommend contacting Scosche directly to see what additional information or options they may be able to offer.
    We appreciate everyone’s patience while this was being looked into. “

    • Fred B

      Thanks, Jimmy, for posting this.

      We at Scosche are looking into this as we had determined it was a Garmin issue but will dig in again to see if anything can be done to help with your Garmin connections.

      Thanks again!


  71. Fred B

    Thanks, Jimmy, for posting this.

    We at Scosche are looking into this as we had determined it was a Garmin issue but will dig in again to see if anything can be done to help with your Garmin connections.

    Thanks again!


  72. My Polar OH1+ has gotten very flakey and is long out of warranty at this point. Amazon is selling the Scosche for $30/pop, which is less than 50% of the price of the polar. At that price difference I bit.

  73. rhworks

    Came here researching a replacement for my Scosche Rhythm+ which has had a solid run but its battery life is down to 90 minutes full-charge to drop dead. Got nearly three and a half years of frequent use (~5x a week) including 14,000 Zwift miles. Never had a problem with the heart rate data or connectivity, just a simple device devoted to doing its job. Stoked to see the Rhythm 2 is a solid choice. Clicking through for an Amazon purchase now, thanks DC.

  74. Alastair Stedman

    Any Ideas why my new Rhythm+ 2.0 is having dips? This is my second ride with it. And I am not quite sure what is going on. I am cycling outside, this is road bike. It is being worn at the top of my arm. sensor towards the outside. Is there a preferable position for the sensor pod of the R+2.0? I am connecting to my phone at the moment. I have yet to try it with my Sigma Rox.

    The drop out seems to occur the same time my phone appears to briefly loose gps signal or something? Could this be a result of my phone polling my smartwatch over bluetooth and causing crosstalk or something?

    • Paul S.

      If I were you, I’d connect it to your Sigma Rox using ANT+ to determine whether it’s your phone or your Rhythm. See what the HR profile from the Sigma looks like compared to that from the phone.

    • Alastair Stedman

      I have been using my Rhythm 2.0+ for about 8 months now and it has been doing great until quite recently. The last two rides my 2.0 went dead halfway through my rides. Apon closer inspection I could see the device was wet inside. Since I do not ride in the rain and I don’t shower with the bloody thing on, my only conclusion that I can make is that the device is absorbing sweat. This is an EXTREMELY poor design if it is getting moisture inside just from the users sweat. This is after all an exercise device. So it is going to be exposed to moisture whether it be from the users own sweat or from water in the case of swimmers who might use this device. Its a shame that this is occurring a few months outside my warranty window. Coincidence?

  75. Mangesh

    What app do folks use with the Rhythm24? I don’t use a watch and want to link it direct to my phone (iOS). Any suggestions? Mainly running and weights.

  76. Jennifer

    I purchased the Rhythm2.0 about a year ago to relplace my original Rhythm+, which was reliable for 6-7 years until battery life was getting too short. I’m on my second R2. First R2 had the power off issues others reported. My second R2 has been giving inaccurate HR despite following Scosche’s recommended HR. About midway through my run, HR starts steadily increasing into the 180s when I’m at a Zone 2 pace. It doesn’t decrease with easier effort. I even saw a cardiologist and confirmed my heart is functioning normally. I train to HR quite often, so inaccurate HR is a definite issue. Might have to switch to a different HR monitor, though I’ve loved my previous Scosche.

  77. Caroline Jones

    Thanks for your great reviews! I just purschased a Scosche and I have a dumb question! How do you actually use it?? Does it override the HRM on my Garmin Fenix5S? That’s how I typically monitor my HR during HIIT workouts and I wanted something more accurate.
    Thanks for any help,

    • Eric Schneider

      This monitor (or a chest heart rate monitor) will override the monitor on the watch.
      Make sure you pair this heart rate monitor to your watch.
      When you start an activity, you will see an indication at the top of your watch that shows this monitor connected (and any other monitors).
      When you push the “start” button to record the activity, the sensor on the watch will turn off, and you will know that the heart rate data is coming from your Scosche.
      Good luck!

    • Caroline Jones

      Thank you! Exactly the information I needed! Cheers :)

  78. Fred B

    New Firmware for the Rhythm+2.0 to help with Garmin (watches) dropouts. Where the HR from the R+2.0 would seem to drop. New firmware can be found on the Rhythm Sync app on iPhones/App Store.

    Happy New Year!

    –Fred B.

    • Jon Niehof

      Is an Android update pending, or is Scosche not supporting the platform anymore?

    • Fred B

      We are working through some new app requirements for Andriod – definitely coming, but it is taking much longer than we had hoped. I’ll post something hear as soon as that goes out.

    • Jon Niehof

      Thank you, it’s appreciated!

    • Fred B

      App Version Number: 2.20
      Firmware Version: 1.022

    • Sascha W

      So it’s February 19th, a month has passed, and there still is no firmware update available through Android.

    • Sascha W

      The Android app to update the firmware is still not out?

    • Adam

      Hi. What is happening for us Android users please. It at least let the app install on an iPad!

    • CHTS

      Its now March and we’re still waiting for an Android app update. Whats the holdup just to update an up that uploads firmware when its already on iOS. Doesnt lead me wanting to buy Scosche in the future.

    • CHTS

      Update is live for Android users not it hasn’t fixed the ant dropout issue does me. Scosche offered to replace it but I can only ship it to California apparently and I’m in the UK so that’s not an option….

    • Tim

      I’ve seen similar dropouts on the Rythm24 as well. I looked for software updates on my iPhone and have none. Is there a pending update with that device or is it still supported?

  79. Alastair Stedman

    I have been using my Rhythm 2.0+ for about 8 months now and it has been doing great until quite recently. The last two rides my 2.0 went dead halfway through my rides. Apon closer inspection I could see the device was wet inside. Since I do not ride in the rain and I don’t shower with the bloody thing on, my only conclusion that I can make is that the device is absorbing sweat. This is an EXTREMELY poor design if it is getting moisture inside just from the users sweat. This is after all an exercise device. So it is going to be exposed to moisture whether it be from the users own sweat or from water in the case of swimmers who might use this device. Its a shame that this is occurring a few months outside my warranty window. Coincidence?