If you're looking for an affordable smartwatch with some advanced health features, the Fitbit Sense 2 is now available for just $179.95.

Fitbit's cardio load feature was confusing and some users called it dangerous. A change in the new Fitbit app tracks it weekly, with better results.

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 ...