a Famous physician-nutritionist Pierre Dukan the years have worked to develop a unique efficient power supply system, which was later called the Dukan Diet. It is represented in the official app of "the Dukan Diet". It includes a calculator for calculating the proper weight depending on the individual indicators, built-in food diary with the distribution of physical activity, control weight loss, a detailed list of permitted products with description, more than five hundred recipes for every day, diary notes and marks, auto-save progress of losing weight and attach a picture, graphic displays of statistics.