The tiny Fitbit Ultra tracks a user's steps, distance, and sleep, as well as counting calories burned. Wireless uploads are automatically sent to user's personal dashboard on Fitbit's site, where free online tools show how the user's physical activities add up. An iPhone app also lets users log workouts, diet, and food goals.
Fitbit Ultra not only holds an accelerometer but an altimeter that tracks the number of stairs or hills climbed each day. To keep you going, the tracker also displays motivational messages when you start moving.