This is an Unique app to show your hrt bt on the screen. This app msures hrt bt automatically, when you place your index finger on the camera. For precise msurements: It is preferable to use a high end mobile phone/tablet with flash light. Sit in a rested position. Keep your finger on the camera and not on the flashlight. Try to keep your finger still and do not shake the device, while taking the msurement.
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