BMI Calculator is free app that allows you to monitor BMI and percentage of fat in your body.
Ideal weight - app calculates the ideal weight you should gain.

It gives you an idea of whether you’re "underweight", a "healthy weight", "overweight", or "obese" for your height. BMI is one type of tool to help health professionals assess the risk for chronic disease.

Calculating body mass index is essential to keep yourself healthy as it will denote you the present physical structure that can be useful in gaining or reducing the weight as per your height and age. You can easily check either you are overweight, underweight, or obese by entering body credentials in no time.