| Price | $549 | $449 | $499 | $699 |
| Product Announcement Date | Jan 5th, 2016 | Jan 6th, 2014 | July 10th, 2014 | June 7th, 2016 |
| Actual Availability/Shipping Date | February 2016 | May 2014 | Sept 2014 | August 2016 |
| GPS Recording Functionality | Yes | Yes | Yes | Yes |
| Data Transfer | USB/Bluetooth Smart/WiFi | USB, BLUETOOTH SMART | USB & Bluetooth Smart | USB & Bluetooth Smart |
| Waterproofing | Yes - 100m | Yes - 30m | Yes - 100m | Yes - 100m |
| Battery Life (GPS) | Up to 50hrs in GPS with optical off, about 20-25% less with optical HR on | Up to 50 hours | Up to 200 Hours | Up to 65 hours |
| Recording Interval | 1S OR SMART | 1s | Variable | Variable |
| Alerts | Vibrate/Sound/Visual | Vibrate/Sound/Visual | Sound/Visual | Sound/Visual/Vibrate |
| Backlight Greatness | Great | Great | Great | Great |
| Ability to download custom apps to unit/device | Yes | No | Yes | No |
| Acts as daily activity monitor (steps, etc...) | Yes | Yes | Minimal | Steps only (not distance/sleep) |
Music | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Can control phone music | YEs | No | No | No |
| Has music storage and playback | No | No | No | No |
| Streaming Services | | No | | No |
Payments | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Contactless-NFC Payments | | No | | No |
Connectivity | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Bluetooth Smart to Phone Uploading | Yes | Yes | Yes | Yes |
| Phone Notifications to unit (i.e. texts/calls/etc...) | Yes | Yes | Yes | Yes |
| Live Tracking (streaming location to website) | Yes | No | No | No |
| Group tracking | No | No | No | No |
| Emergency/SOS Message Notification (from watch to contacts) | No | No | No | No |
| Built-in cellular chip (no phone required) | No | No | No | No |
Cycling | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Designed for cycling | Yes | Yes | Yes | Yes |
| Power Meter Capable | Yes | Yes | Yes | Yes |
| Power Meter Configuration/Calibration Options | Yes | Yes | Yes | Yes |
| Power Meter TSS/NP/IF | Yes | NP | No | No |
| Speed/Cadence Sensor Capable | Yes | Yes | Yes | Yes |
| Strava segments live on device | No | Yes | No | No |
| Crash detection | No | No | No | No |
Running | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Designed for running | Yes | Yes | Yes | Yes |
| Footpod Capable (For treadmills) | YEs | Yes | Yes | Yes |
| Running Dynamics (vertical oscillation, ground contact time, etc...) | With HRM-TRI or HRM-RUN (Not via Optical HR) | No | No | No |
| Running Power | | With extra sensor | | |
| VO2Max Estimation | YEs | Yes | Yes | Yes |
| Race Predictor | Yes | Yes, via Race Pace | No | No |
| Recovery Advisor | Yes | Yes | Yes | Yes |
| Run/Walk Mode | YEs | Yes, via timers | No | No |
Swimming | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Designed for swimming | Yes | Yes | Yes | Yes |
| Openwater swimming mode | Yes | Yes | Yes | Yes |
| Lap/Indoor Distance Tracking | Yes | Yes | Yes | Yes |
| Record HR underwater | WITH HRM-TRI/HRM-SWIM (Not with optical HR) | With Certain Polar Straps | Yes | Yes |
| Openwater Metrics (Stroke/etc.) | Yes | Yes | Yes | Yes |
| Indoor Metrics (Stroke/etc.) | YEs | Yes | Yes | Yes |
| Indoor Drill Mode | YEs | No | Yes | No |
| Indoor auto-pause feature | YEs | Yes | No | No |
| Change pool size | Yes | Yes | Yes | Yes |
| Indoor Min/Max Pool Lengths | 17M/18Y TO 150Y/M | 20M/Y to 250 m/y | 15m/y to 1,200m/y | 15m/y to 1,200m/y |
| Ability to customize data fields | YEs | Yes | Yes | yes |
| Captures per length data - indoors | YEs | Yes | Yes | Yes |
| Indoor Alerts | Yes | N/A | No | No |
Triathlon | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Designed for triathlon | Yes | Yes | Yes | Yes |
| Multisport mode | Yes | Yes | Yes | Yes |
Workouts | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Create/Follow custom workouts | Yes | Yes | No | No |
| On-unit interval Feature | Yes | Yes | Barely | Yes (added Mar 31st, 2017) |
| Training Calendar Functionality | Yes | Yes | No | Yes |
Functions | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Auto Start/Stop | Yes | Yes | Yes | No |
| Virtual Partner Feature | Yes | Yes | No | No |
| Virtual Racer Feature | YEs | No | No | No |
| Records PR's - Personal Records (diff than history) | Yes | No | No | No |
| Tidal Tables (Tide Information) | No | No | No | No |
| Weather Display (live data) | yES | No | No | No |
Navigate | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Follow GPS Track (Courses/Waypoints) | Yes | Yes | Yes | Yes |
| Markers/Waypoint Direction | Yes | Yes | Yes | Yes |
| Routable/Visual Maps (like car GPS) | No | No | No | No |
| Back to start | Yes | Yes | Yes | Yes |
| Impromptu Round Trip Route Creation | No | No | No | No |
| Download courses/routes from phone to unit | Yes | Yes | Yes | Yes |
Sensors | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Altimeter Type | Barometric | Barometric | Barometric | Barometric |
| Compass Type | Magnetic | Magnetic | Magnetic | Magnetic |
| Optical Heart Rate Sensor internally | Yes | No | No | No |
| SpO2 (aka Pulse Oximetry) | | | | No |
| Heart Rate Strap Compatible | Yes | Yes | Yes | Yes |
| ANT+ Heart Rate Strap Capable | Yes | No | No | No |
| ANT+ Speed/Cadence Capable | YEs | No | No | No |
| ANT+ Footpod Capable | YEs | No | No | No |
| ANT+ Power Meter Capable | Yes | No | No | No |
| ANT+ Lighting Control | No | No | No | No |
| ANT+ Bike Radar Integration | No | No | No | No |
| ANT+ Trainer Control (FE-C) | No | No | No | No |
| ANT+ Remote Control | No (can control VIRB though) | no (but can control GoPro) | No | No |
| ANT+ eBike Compatibility | No | No | No | No |
| ANT+ Gear Shifting (i.e. SRAM ETAP) | No | No | No | No |
| Shimano Di2 Shifting | No | No | No | No |
| Bluetooth Smart HR Strap Capable | No | Yes | Yes | Yes |
| Bluetooth Smart Speed/Cadence Capable | No | Yes | Yes | YEs |
| Bluetooth Smart Footpod Capable | nO | Yes | Yes | Yes |
| Bluetooth Smart Power Meter Capable | No | Yes | Yes | Yes |
| Temp Recording (internal sensor) | Yes | Yes | Yes | Yes |
| Temp Recording (external sensor) | Yes | No | No | No |
Software | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | PC Application | Garmin Express | Polar Flowsync - Windows/Mac | Moveslink Agent | PC/Mac |
| Web Application | Garmin Connect | Polar Flow | Suunto Movescount | Suunto Movescount |
| Phone App | iOS/Android/Windows Phone | iOS/Android | iOS/Android | iOS /Android |
| Ability to Export Settings | No | No | No | No |
Purchase | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Amazon | Link | Link | Link | Link |
DCRainmaker | Garmin Fenix3 HR | Polar V800 | Suunto Ambit3 Peak | Suunto Spartan Ultra | | Review Link | Link | Link | Link | Link |