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Fitbit Flex

If you still haven't picked up a Nike+ Fuelband or Jawbone Up, you ought to add the Fitbit Flex ($100) to your list of fitness trackers to check out. Like the others, the Flex is designed to be worn on your wrist, and tracks your steps, distance traveled, calories burned, active minutes, and quality of sleep, all of which it syncs to your iPhone or Android device via Bluetooth 4.0. It can even vibrate to wake you up gently. Arriving this Spring in a variety of stylish colors.

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