Skip to main content
Source Link
Brian Campbell
  • 4.3k
  • 2
  • 35
  • 40

Not the most convenient way of measuring your heart rate while cycling, but Instant Heart Rate is a neat program which might be useful when you to take a break. You use your phone's camera and LED flash (if it has one, otherwise any bright light source) to measure your heart rate by pressing the camera and flash against your finger, and it detects fluctuations in the oxygen content of your blood by detecting changes in color.

Post Made Community Wiki