Fitbit makes every step you take a step toward better fitness, even on your busiest days. Fitbit Ultra's super sensitive 3-D motion sensor tracks your day down to details a pedometer can't catch, showing your exact steps taken, calories burned, and distance traveled. The new altimeter tracks floors climbed so you can monitor this heart-healthy activity, encouraging you to take the stairs at home or work, or climb a little further on your next hike.

We all know solid sleep is hugely important to well-being and weight loss. But until now the question has been: just how do you track sleep? The answer — the Fitbit Tracker. Slip your Tracker into the Fitbit sleep wristband before bed, and it will keep a watchful eye as you slumber. When your info uploads to Fitbit.com, you'll see not only how long you sleep, but how well you sleep.

The Tracker monitors how many times and how long you wake up during the night. Over time, you can apply what you learn to better understanding what helps you sleep better.

Tiny, comfortable, and discreet

Unlike bulky, awkward devices that all but scream, "Look at me, I'm on a diet," the Fitbit Tracker is light and small enough to wear all day without anyone knowing. In fact, it's the smallest fitness tracker out there. Tuck it in your pocket, or clip it to your belt or bra, and you're set.

Upload wirelessly

Your stats automatically upload to Fitbit.com whenever your Tracker is within about 15 feet of the base station plugged into your Mac or PC. There are no buttons to push, no data to enter, just your stats waiting for you to explore.

Share with friends

Nothing motivates like a supportive community and a little healthy competition. On Fitbit.com you can share info with friends and create your own private groups with friends and family to set collaborative or competitive goals. You can also join public groups and forums to ask questions and get advice from thousands of people with similar fitness goals.