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Free check
Place your finger on the rear camera — in 30 seconds your pulse, its live wave and how regular your heartbeat is appear on the screen.
30 seconds — and you will see with your own eyes how your heart is beating.
The camera image is not sent anywhere and is not saved: all calculations happen on this phone itself.
The flashlight lights up the fingertip, and the camera sees the light that passes through it.
Each time the heart beats, blood reaches the finger and the image gets imperceptibly darker. The phone measures this change 30 times per second.
Besides the pulse rate, the time between every two beats is also calculated: this is how we know how regular the rhythm is.