“Arcus Motion Analyzer” by Arcus Motion (2014)
The Arcus ring is pretty awesome in that it does not only apply its technology to health and fitness, although it does market those features considering they’re the biggest reason people buy wearable tech. The Arcus does much more, though: it can use its motion analysis software to communicate with other technologies smoothly. It’s water proof and it can be connected via Bluetooth to any device that supports it. How applicable!