The new features measure a person’s respiratory rate and heart rate using their phone’s camera. The respiratory tool works like a person taking a selfie. While posed in front of the camera, the software measures breathing by detecting small movements of the chest. . For the heart rate tool, placing a finger on top of the rear camera lens lets the software analyze subtle changes of color to the skin of the fingertip.
Link: Google to add heart and respiratory rate tracking to Android phones
via http://www.cnet.com
