Add Yahoo as a preferred source to see more of our stories on Google. The Fitbit app is free to use, but Fitbit Premium adds additional features to the tracker. You can pay for Fitbit Premium on a ...

Get the most out of the app, and make the strap more comfortable while you're at it.

Your Fitbit app is transforming into Google Health, with some big changes to data management and personal training. Google Health will be able to incorporate health data across disparate sources, even ...