2. Fitbit One

There are several different gadgets that you can get that are made by Fitbit, but this one seems to have it all. The Fitbit One tracks a variety of your activities, such as steps taken and calories burned. If you wear the Fitbit One on your arm while you sleep, it will track how many hours you slept and how much you woke up during that time. You can also export the data from your Fitbit One to the fitness app that you currently use.