****IMPORTANT: For correct reading hold your index finger on the camera
lens steadily and lightly for the whole measuring process. Don’t move
your finger until measuring is complete, breath normally! Heart rate is
measured by detecting change in color on your fingertip that changes
with every heart beat due to blood flow. 
Heart Rate Monitor - For Android
****IMPORTANT: For correct reading hold your index finger on the camera
lens steadily and lightly for the whole measuring process. Don’t move
your finger until measuring is complete, breath normally! Heart rate is
measured by detecting change in color on your fingertip that changes
with every heart beat due to blood flow. 
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