1. I use it both with a Bluetooth chest heart rate strap (PowrLabs) as well as the camera on my Samsung S8 and both work pretty well, although when my fingers are cold has a hard time finding my heart rate.
2. The app does now work after this update, which is great! My polar h10 sensor now works thankfully, but the camera/flashlight sensor does not work well enough to be usable (on a Google Pixel 2), although this could just be my phone.
3. If it be, i would pay more for all features because app is great, but this THIEF trick is awfulHeart rate monitor doesn't work on galaxy s20 ultra.
4. Beyond that, I turned on the monitor and held the camera light against my wall and somehow the app was picking up a heartbeat and giving me a resonance reading!I am exploring the potential of the coherent breathing technique for stress management.
5. I also think that the app will benefit from a more detailed help section and more information for users with little knowledge about coherent breathing.arch I haveUpdating my review as they've now (finally) released a new version for Android.
6. far too expensive for what it does, even if it would work.Paid, after payment my reaction was "co jest ku*wa".
7. Probably doesn't work on any phone that flash and camera are not REALLY really close together.
8. After payment you will see other features for payment, like sounds for breathing is still limited to 90 sec, there is no information its not included in first payment.
9. After paying over $10 for the app to work with Bluetooth, they then reveal that you have to pay extra for each little feature.
10. measuring heart rate with camera is more miss than hit.
11. It helps me to reduce my heart rate when it gets a little high as well as helps me feel calmer.