Jawbone - UP Move Activity Tracker - Purple Guides you to get fit, lose weight and have fun doing it. Tracks steps, exercise, overall calories burned, hours slept and quality of sleep. For best results, wear your UP MOVE on your wrist at night while you sleep Track your food, drink, calories, nutrients and use the UP App Food Score to quickly know if you are eating right Compatible with iOS and Android; Requires installation of free Jawbone UP smartphone app Connects you with friends and family so you can reach your goals together or see how you measure up on the team leaderboards