Fitness app of the day - BMI Calculator (Android iPhone) Price: Free Are you one of those who find it difficult to calculate your Body Mass Index? Then you need the BMI Calculator. It gives you results right from underweight to morbidly obese by just filling up parameters like height age etc. Also it has features like Waist-to-Height ratio which measures abdominal obesity and therefore can be used as a better indicator of health risks than Body Mass Index. The app also allows you to keep track of the internal heat produced and amount of external work done with the