You can find out how we test products here. You may not think you need a fitness mirror. You may not even know what a fitness mirror is. But, hopefully, by the time you finish reading this review ...

A mirror can't show how your body is changing ... they're generally anything up to 8% out. The Naked 3D Fitness Tracker, which goes on pre-order Thursday for $499, seems poised to change the ...

Score the most popular fitness Mirror before the big rebrand. Credit: Mirror Deal pricing and availability subject to change after time of publication. Learn more about how we select deals.

The newest fitness tracker isn't wearable. Instead, the Naked 3D Fitness Tracker is a full-length mirror that takes a scan of your body to record exact measurements, fat percentages and weight.