So if it's late in the day and you still have 8,000 steps to get to your goal of 15,000, you know it's time to get going, and fast. The clip has a built-in OLED ( organic light-emitting diode) that scrolls current activity data. Thrashing around at midnight because of that quadruple latte you gulped at 4 p.m.? FitBit will know. It knows when you go to bed, how frequently you awaken and how long you lie prostrate, staring at the ceiling, pondering unmet deadlines. It's also sensitive enough to detect just how vigorous your motions are, which differentiates a slow stroll from a jog that consumes far more calories.Īt night, you slip the FitBit into a wristband so it can monitor your sleep quality. Throughout the day, FitBit logs a range of data about your activities, including the number of steps you take, distance traversed and calories burned. About the size of a clothes pin, the FitBit is shaped like a clip, which you can easily slide into your pants pocket or onto a bra strap, as it's only around 2 inches (5 centimeters) long and about half an inch (1.2 centimeters) thick.

Fit bit trackers