Hot on the heels of rumors that Powerbeats Pro 2 could beat AirPods to the punch for heart-rate monitoring, fresh images have landed – and they look good.

This app is a favorite of heart rate researchers (it was even used in the study mentioned above). Like Cardiio, this heart rate monitor is free to use, but nearly everything else is behind a ...

a heart-rate monitor in the companion app. The rumor mill's really ramped up a gear in the past couple of weeks, most recently thanks to MacRumors (who spotted a hidden line of code in iOS 18 ...