The effects of a diet or exercise program can only be monitored when you have accurate biometric data. This application will help you calculate your Body Fat Percentage*. The best time to use this application, is in the morning. Your body weight and waist measurements are the most accurate just after you wake up.Application will not calculate your exact body fat percentage. The most accurate way is underwater weighing, but this should give you a consistent measurement you can use as a guideline.*A person’s body mass percentage is the total weight of the person’s fat divided by the person’s weight and consists of essential body fat and storage body fat.