A body composition scale analyzes how electrical signals flow through your body, estimating how much of your total weight is fat-free mass compared to body fat. You may not always get every answer ...

Rather than merely measuring weight, the Body Comp also evaluates body composition (hence the name), basal metabolic rate, standing heart rate, and visceral fat — that is, the fat around your ...

Read our ethics policy. Health company Withings has launched a new Apple Health compatible smart scale to provide weight and body composition measurements — and even an "Eyes Closed" mode.