| Price | $79 | $99 | $199 | $249 | $199 | $149 | $79 | $55 | $79 | $99 | $99 | $79 | $49 | $79 | $79 | $79 |
| Product Announce Date | Jan 7th, 2013 | Sept 16th, 2013 | | Mar 2013 | Jun 25th, 2012 | August 8th, 2014 | Jan 6th, 2014 | Jun 19th, 2012 | Aug 30th, 2017 | Jun 15, 2011 | Jan 9th, 2018 | Jan 6th, 2014 | Jan 6th, 2014 | Jan 3rd, 2018 | Jan 6th, 2014 | Jan 6th, 2014 |
| Product Availability Date | July 2013 | Nov 2013 | | Jan 2014 | December 2012 | December 1st, 2014 | Apr 11th, 2014 | July 2012 | Late Sept 2017 | Sept 2012 | Late April 2018 | Early May 2014 | Apr 2014 | Jan 3rd, 2018 | May 1st, 2014 | Sept 1st, 2014 |
| Measurement Type | ECG | ECG | | Optical | Optical | Optical | Optical | ECG | Optical HR | ECG | Optical | Optical | ECG | Optical | ECG | ECG |
| Typical Placement | Chest Strap | Chest Strap | | Head (Helmet) | Wrist Strap | Wrist Strap | Wrist Strap | Chest Strap | Upper Arm | Chest Strap | Mid/Upper Arm | Mid/Upper Arm | Chest Strap | Mid/Upper Arm | Chest Strap | Chest Strap |
| Battery Life | 200 hours | 1-2 years | | 13-15 hours | 8-10 hrs | 6-7 hrs | 8-10 hrs | 1-2 years | 12 hours | 1-2 years | 24 hours+ | 7-8 hours | 350 hours | 30 hours | 1-2 years | 1-2 Years |
| Battery Type | Coin Cell CR2032 | Coin Cell CR2032 | | USB rechargeable | USB rechargeable | USB rechargeable | USB rechargeable | Coin Cell CR2032 | USB Rechargeable | Coin Cell CR2032 | USB rechargeable | USB rechargeable | Coin Cell CR2032 | USB rechargeable | Coin Cell CR2032 | Coin Cell CR2032 |
| NFC Capable | No | No | | | | | | | No | | Yes | | No | No | | No |
HR Transmission | 4iiii Viiiiva | Garmin HRM-RUN | Garmin HRM-TRI/HRM-SWIM Bundle | LifeBEAM Smart Helmet | Mio Alpha | Mio Fuse | Mio Link | Polar H7 | Polar OH1 | PowerTap PowerCal (Dual ANT+/BLE) | Scosche Rhythm 24 | Scosche RHYTHM+ | Wahoo TICKR (Original) | Wahoo TICKR FIT | Wahoo TICKR RUN | Wahoo TICKR X (Original) | | ANT+ | Yes | Yes | | Yes (specific Model) | No (Kickstarter model only) | Yes | Yes | No | Yes (with firmware update) | Yes (Specific model) | Yes | Yes | Yes | Yes | Yes | Yes |
| Bluetooth Smart | Yes | No | | Yes (specific Model) | Yes | Yes | Yes | Yes | Yes | Yes (Specific model) | Yes | Yes | Yes | Yes | Yes | Yes |
| Dual concurrent ANT+/BLE | Yes | No | | No | No | Yes | Yes | No | No | No | Yes | Yes | Yes | Yes | Yes | Yes |
| Analog for gym equipment | No | No | | No | No | No | No | Yes | No | No | No | No | No | No | No | No |
| Usable HR data underwater | No | No | | No | No | Depends: If on same wrist, YMMV. | Depends: If on same wrist, YMMV. | Yes | No | No | Depends: If on same wrist, YMMV. | Depends: If on same wrist, YMMV. | No | Depends: If on same wrist, YMMV. | No | No |
| Bridging ANT+ to Bluetooth Smart | Yes | No | | No | No | No | No | No | No | No | No | No | No | No | No | No |
| Can record activity in memory | yes | No | | No | No | Yes | No | No | Yes | No | Yes | No | No | No | No | Yes |
Additional Data | 4iiii Viiiiva | Garmin HRM-RUN | Garmin HRM-TRI/HRM-SWIM Bundle | LifeBEAM Smart Helmet | Mio Alpha | Mio Fuse | Mio Link | Polar H7 | Polar OH1 | PowerTap PowerCal (Dual ANT+/BLE) | Scosche Rhythm 24 | Scosche RHYTHM+ | Wahoo TICKR (Original) | Wahoo TICKR FIT | Wahoo TICKR RUN | Wahoo TICKR X (Original) | | Run Pace | No | No | | No | No | Yes | No | No | No | No | Yes | Yes (firmware 3.01 and above) | No | No | Yes | Yes |
| Run Cadence | No | Yes | | No | No | No | No | No | No | No | YEs | Yes (firmware 3.01 and above) | No | No | Yes | Yes |
| Run Economy/Metrics | No | Yes (ANT+ Running Dynamics) | | No | No | No | No | No | No | No | No | No | No | No | Yes | Yes |
| Cycling Cadence | No | No | | | | | | | | | Yes | | No | No | | Yes |
| Cycling Power Meter Estimation | Can pass through ANT+ PM's | No | | | | No | No | | No | Yes | No | No | No | No | No | No |
| Valid HRV/RR data | Yes | Yes | | No | No | No | No | Yes | No | Yes | At rest only | No | Yes | No | Yes | Yes |
| Configurable Sport Modes | Sorta | No | | | | | | | No | | Yes | | No | No | | Sorta |
| Displays HR Zones | No | No | | | | | | | No | | Yes | | No | No | | No |
| Requires Bluetooth Smart Phone for Configuration | Yes (for bridging only) | No | | No | No | Yes | Yes (for HR zones) | No | No | No | Yes | No | No | No | For Running Metrics Only | For Running Metrics Only & DoubleTap |
| Firmware Updateable | Yes | Via Garmin device/ANT+ Stick | | No | No | Yes | Yes | No | Yes | No | Yes | Yes for newish units | Yes (iOS/Android) | Yes | Yes (iOS/Android) | Yes |
| SDK For App Developers | | | | | | | | | | | | | | No | | |
App | 4iiii Viiiiva | Garmin HRM-RUN | Garmin HRM-TRI/HRM-SWIM Bundle | LifeBEAM Smart Helmet | Mio Alpha | Mio Fuse | Mio Link | Polar H7 | Polar OH1 | PowerTap PowerCal (Dual ANT+/BLE) | Scosche Rhythm 24 | Scosche RHYTHM+ | Wahoo TICKR (Original) | Wahoo TICKR FIT | Wahoo TICKR RUN | Wahoo TICKR X (Original) | | Can show workout afterwards | Yes | No | | | | | | | Yes | | No | | No | N/A (No recording) | | Yes |
| Can sync files/workout to 3rd party | Yes | No | | | | | | | Yes | | Yes | | No | N/A (No recording) | | Yes |
| More Info | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link |
Purchase | 4iiii Viiiiva | Garmin HRM-RUN | Garmin HRM-TRI/HRM-SWIM Bundle | LifeBEAM Smart Helmet | Mio Alpha | Mio Fuse | Mio Link | Polar H7 | Polar OH1 | PowerTap PowerCal (Dual ANT+/BLE) | Scosche Rhythm 24 | Scosche RHYTHM+ | Wahoo TICKR (Original) | Wahoo TICKR FIT | Wahoo TICKR RUN | Wahoo TICKR X (Original) | | Amazon | Link | Link | Link | N/A | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link | Link |
| Backcountry.com | | | | | | | | | | | | | Link | Link | | |
| Competitive Cyclist | | | | | | | | | | | | | | Link | | |
| REI | | | | | | | | | | | | | | Link | | |