App Turns Your iPhones Camera Into a Heartrate Monitor [VIDEO]

A new iPhone app turns your device's camera into a biosensor to measure your heart rate. It does this by measuring light reflected off your face. The app from the Rock Health accelerator program is called Cardiio.

The company explains how the app works on its website: "Every time your heart beats, more blood is pumped into your face. This slight increase in blood volume causes more light to be absorbed, and hence less light is reflected from your face. Using sophisticated software, your iPhone's front camera can track these tiny changes in reflected light that are not visible to the human eye and calculate your heart beat!"

The technology was …
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