This program is designed to measure heart rate through your Android phone.

  The program does not require any additional hardware and how it works is very easy.

  This program can be used on all android phones and your heart rate is measured by the camera and flash.

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The number of beats (cardiac frequency) is defined natural that most of these, tachycardia and less of it, bradycardia name:

In infants (1 to 30 days): 140 to 160 beats per minute
Infants (1 to 3 years old): 120 to 140 beats per minute
Children (3 to 12 years): 100 to 120 beats per minute
Adults: 60 to 100 beats per minute