Body analysis scales not only measure your weight, but also provide a complete analysis of your body. These models measure your fat percentage, body water, bone mass, or muscle mass. Most scales also calculate your BMI, so you can see at a glance whether you have a healthy weight for your physique. Use a scale with analysis software to read and analyze your data on your smartphone or PC. For example, you can save a measurement of your fat percentage and view it every day. This makes tracking weight goals easier.