Add Yahoo as a preferred source to see more of our stories on Google. If just by looking at our watch or cell phone we can know, in real time, our heart rate, the number of steps we take, the calories ...

ON THE OUTSIDE, the Oura ring looks rather ordinary, indistinguishable from a chunky wedding band. But a faint green light that intermittently leaks out from the gap between finger and ring suggests ...

Measuring distances accurately has become significantly easier with the advent of smartphone technology, particularly with the array of distance measuring apps available for both Android and iPhone.