Meet the Trivoly: a tiny disc that turns your watch into a smartwatch. It lets you track your daily activity, control your music, take selfies, and do a whole lot more. It works with any watch. For starters, it helps you keep up with your notifications and messages. The device is water resistant and has a heart rate monitor and step counter.
The Trivoly is super thin and has a 4-day battery life. You get silent vibrating alarms as well. The device is compatible with iOS and Android phones. More information is available on Kickstarter.