Heart rate · PPG
--bpm
Signal –Beats 0Flash offFPS –
Tap Start to allow the camera and flash.
  1. Cover the main rear lens and the flash with one fingertip. The preview circle should glow solid red.
  2. Press lightly. Pressing hard flattens the signal.
  3. Hold still for about 20 seconds.

Not a medical device. For curiosity only.

Diagnostics 
Not started.