Instant Heart Rate is the most accurate Heart Rate Monitor app for any smartphone and it does not need any external hardware.
Accuracy is constantly tested by fitness coaches, nurses, doctors, EMTs and 5 million users like you.
It uses your phones built-in camera to track color changes on the fingertip that are directly linked to your pulse. This is the same technique that medical pulse oxi meters use.
Instant Heart Rate Monitor Pro v5.36.2817 Apk