HeartRate+ Coherence PRO funktioniert nicht

HeartRate+ Coherence PRO is the first application which includes a breathing guide and measure how well you are doing the breathing exercise via monitoring your heart rate and showing the level of cardiorespiratory coherence that you have reached.  Slow breathing exercises, performed with a breathing cycle of 10s (cardiorespiratory resonance frequency), have been shown to help reduce stress, improve performances and make you feel more relaxed and ready for action.  Monitor your heart rate while doing the guided slow breathing exercises.  But how do you know you are actually doing your breathing exercise well?  Why is this important to you?  HeartRate+ Coherence PRO detects the heart rate via Bluetooth external devices and the device's camera.