The Fitbit One looks a lot like the Ultra – just a slimmed down version of its predecessor. Available in black or burgundy, the device comes with a silicon clip so you can attach it onto your clothes ...

The Fitbit app is free to use, but Fitbit Premium adds additional features to the tracker. You can pay for Fitbit Premium on a rolling monthly basis or per year. Fitbit devices don't need a constant ...

Compete against multiple people regardless of the device and fitness tracker they are using with the Challenges app. The Challenges app is compatible with an Apple Watch, Fitbit, or any device that ...