Fitbit Zip & One
Keep track of your activity day and night with the Fitbit Zip & One ($60-$100). The colorful Zip tracks your steps taken, distance traveled, and calories burned, and lets you simply tap to get your stats, while the One also tracks stairs climbed and monitors how long and how well you sleep, and can quietly wake you up in the morning by gently vibrating on your wrist. As a bonus, both sensors sync to your smartphone or tablet using Bluetooth 4.0, making battery life worries a thing of the past.
