These are the best smart scales to buy in every category, from Withings Body and Garmin Index S2 to Renpho Elis 1.

Smart scales track changes in your muscle mass, body fat percentage and other health metrics — but how do they work?

This is the percentage of the body's mass that is fluid. The human body is 50 to 75 percent water, and how much you have at ...

The Withings Body Comp Smart Scale is on sale for $169.95, an over 25% markdown from its usual $229.95 for Prime Day. This ...

New Withing's scale offers home health body assessments via embedded sensors to monitor multiple biomarkers associated with general and chronic health risks ...

Professional Body Analysis Report The Lepulse P1 Body Composition Scale provides a professional interpretation of each body composition metric, with reports that are easy to share and print.

The Withings Body smart scale is an intuitive and effective appliance that sends basic info via Wi-Fi.

Xiaomi Mi Body Composition Scale S200, priced at 69 yuan ($10), offers precise weight tracking, BMI calculation, supports 36 users, and a balance test function.

The Renopho MorphoScan is a more affordable segmental body composition scale, and it shows.

The Body Comp smart scale with Apple Health integration will be launching on October 4 with full body composition measurements, cardiovascular and nerve assessments, and more.