The app is very easy to use. You set your gender, activity level, age, height and weight. Once you press Calculate it will show you a result.

Basal metabolic rate (BMR) is the total number of calories that your body needs to perform basic, life-sustaining functions. These basal functions include circulation, breathing, cell production, nutrient processing, protein synthesis, and ion transport.

It also shows you how many calories you should consume daily to maintain your current body weight.

Disclaimer: Your BMR result is based on Mifflin - St Jeor formula. This app is intended for educational purposes only. No clinical decisions should be made based on this app. In addition of using this app please seek doctor's advice before making any medical decisions.