It is not possible to indicate a universal average body weight as it is strongly affected by age, gender, height, and genetic makeup but also physical activity, diet, and environmental and social factors in certain cases.
It is possible to calculate your ideal personal weight by basing your calculation on your age, gender and height.
The ideal weight suggested by the App is the average value of the four most quoted formulas in literature: Broca, Van Der Wael, Keys, and Perrault.