If you like your fitness trackers sleek and minimal, then the Misfit Shine (£80) may be for you. The Shine conceals its technology in a metallic orb (choose from four different colours) and tracks steps, calories, and sleep. It can also track activities (running, cycling, and swimming). The circular, waterproof Shine can be worn on your wrist, clipped to your clothing, or worn as a necklace, depending on which accessory you buy, and includes a watch battery that lasts about four months. The lights on the Shine can tell you how much progress you've made that day, but for more detailed information, you'll need the free iOS or Android app; the Shine syncs with the app when you place it on your phone.