A BMI calculator depending on gender, age, height and weight. Issues recommendations depending on the calculated BMI value. Underweight, overweight, normal weight but also anorexia or obesity are calculated and analyzed. The app is bilingual: German and English. The language is selected automatically and depends on the language set on the mobile phone. Alternatively, the language can also be changed via the settings in the app. If necessary, Ad Mob can be integrated and thus generate good monthly income.