Compatibility Matrix

Which sensors work with which apps

Sensor Elite HRV HRV4Training Kubios HRV HeartMath Welltory Polar Flow Garmin Connect Whoop App Oura App Apple Health
Polar H10
Chest Strap 		✓ ✓ ✓ ✓ ✓ ✓ ✓ — — ✓
Polar H9
Chest Strap 		✓ ✓ ✓ ✓ ✓ ✓ ✓ — — ✓
Polar H7
Chest Strap 		✓ ✓ ✓ ✓ ✓ ✓ ◐ — — ✓
Garmin HRM-Pro Plus
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ✓ — — ✓
Garmin HRM 600
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ✓ — — ✓
Garmin HRM-Dual
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ✓ — — ✓
Garmin HRM 200
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ✓ — — ✓
Wahoo TICKR
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ✓ — — ✓
4iiii Viiiiva
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ✓ — — ✓
Suunto Smart Belt
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ✓ — — ✓
Cardiosport TP3
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ◐ — — ✓
Zephyr HxM
Chest Strap 		✓ ✓ ✓ ✓ ✓ — ◐ — — ✓
Polar Verity Sense
Arm Band 		— — ✓ — — ✓ ◐ — — ◐
Wahoo TICKR FIT
Arm Band 		— — — — — — ◐ — — ◐
Polar OH1
Arm Band 		— — ✓ — — ✓ ◐ — — ◐
Inner Balance Sensor
Ear Clip 		— — — ✓ — — — — — —
Apple Watch
Wrist 		— ◐ — — ◐ — — — — ✓
Whoop 5.0
Wrist 		— — — — — — — ✓ — ◐
Biostrap
Wrist 		— — — — ◐ — — — — ◐
Oura Ring 4
Ring 		— — — — — — — — ✓ ◐
✓ Full support ◐ Partial support — Not compatible

Notes

Key Takeaways

Best flexibility: Bluetooth chest straps like the Polar H10 work with almost every third-party app. If you want freedom to switch apps, start here.

Locked ecosystems: Whoop and Oura devices only work with their own apps. You get a polished experience but can't use alternative software.

Apple Watch: Limited third-party HRV app support. Some apps use the phone's camera instead of the watch sensors.

Camera-based: HRV4Training and Welltory can measure HRV using your phone's camera—no hardware needed, though accuracy is lower than dedicated sensors.