These scales have sensors to track your body composition ... Most models even connect to some of the best workout apps so that you can see all your health and fitness stats in a single place ...

A body fat scale can measure body fat percentage, muscle mass, bone density, and more. But they’re not always accurate. Here’s what to know about body fat scales and our top choices.

This is all done by biometric impedance analysis (BIA), which involves sending a small electrical current through to different body parts. From there, the smart scales use data from the speed of ...