Cardiio
Meet Cardiio, a completely new way to check your pulse. Just hold your phone or tablet in front of you and get your heart rate accurately measured in seconds. It's heart rate monitoring, reinvented. Based on technology born at MIT, Cardiio uses your phone's front camera to analyze the amount of light reflected off your face; it accurately measures your pulse without any extra hardware accessories. Just hold your phone in front of you to get your reading in seconds.
