Most fitness trackers take the form of a wearable wrist band -- which many users find unsightly or cumbersome. But now researchers say that heart rate, breathing and other physiological measurements can be taken from a smartphone that sits in your bag or pocket -- without even touching your body.
The BioPhone, developed by researchers at MIT, derives biological signals from your phone's accelerometer. They claim that it can "capture the small movements of your body that result from the beating of your heart".
This data is, according to researchers, captured during moments when you're not moving, meaning small vibrations can be picked up without interference from larger bodily movements. This could, they say, lead to better monitoring of things like stress level and culminate in a phone notification telling you to try breathing exercises or to call a loved one.
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