You'd think a device meant to be worn day in and day out would take a more customized approach to fit, but the majority of activity monitors on the market take more of a one-size-fits-all approach. Not the Reign Activity Tracker ($TBA). It's made out of soft, seamless materials that actually shape to fit your wrist over time, while eight interchangeable size options let you tailor it to you. Like most activity monitors, it is compatible with iPhone, Android, and web apps, while featuring wireless connectivity. It also tracks your life by activity, monitors your sleep, and lets you know when it's time to get active.