The best way to stay fit is to be active and Fitbit helps you do so. This is a slim, good looking fitness companion that remains by your side through the day. Its primary job is to track your steps, distance walked and calories burnt. You could argue that most pedometers do this but Fitbit works because it is accurate. Continue to wear it on your wrist while sleeping and it will measure your sleep quality as well. A silent wake up alarm vibrates, gently breaking your slumber spell. It wirelessly syncs with select Android phones, iPhone, iPad, & iPod over Bluetooth 4.0.