Similar to the Nike+ FuelBand, the Fitbit Flex Wristband is the latest version of fitness tracker after the Fitbit One. It does away with the old Fitbit’s built-in screen and replaces it with five LEDs that lets your track your progress toward your goal. Importantly, it is the first fitness tracker to utilise Bluetooth 4.0 to sync with smartphone devices. It also keeps the favourite Fitbit One features including sleep tracking and the vibrating silent alarm which won’t disturb your partner. As shown above, the Flex comes in five colours: Black, Slate, Teal, Tangerine, Navy. Available for $100.