HRV4Training helps you optimize your goals and prevent overtraining by measuring your heart rate variability (HRV). Uses your mobile device’s camera and flash or can be paired with a bluetooth heart rate monitor like the Polar H10.

Tired of strapping that chest strap on every morning? HRV4Training is the first validated app able to measure your Heart Rate and Heart Rate Variability reliably, without requiring any sensor.

HRV4Training on iOS works with regular Bluetooth 4.0 sensors as well (e.g. a Polar H10), while on Android both Bluetooth 4.0 and ANT+ are supported.  You can also use and Apple Watch to measure HRV and read it in HRV4Training