When the app starts, the flash turns on and stays on. It gets hot, so I can't keep my finger on the camera lens...and I don't want to burn down my battery by keeping the flash on. Good idea, bad execution. Also, my Samsung can already take my heart rate, so why doesn't the app use that function?
Camera/pulse sensor is very finicky and it seems nearly impossible to keep a finger in the proper place for it to take your pulse. The app is well designed and the concept is great but the pulse sensor could be more responsive. Tried with case on and off using nexus 6. Possibly adding a setting to calibrate per phone/camera could help this flaw? Update: no updates since release :(