FITBIT FLEX

From the jury's assessment

The “flex” sleep and activity tracker from Fitbit records not only all the day's activities, such as steps taken, distance covered and calories burned, but also tracks sleep automatically. It also determines the optimum waking time and, with its vibration alarm, makes for a pleasant wake-up. Synchronisation with a smartphone or computer takes place wirelessly and automatically. The Flex sits comfortably around your wrist, is water-protected and has a battery life of 5 days.