The document discusses obesity and introduces a diet plan app called HOSTEL Diet Plan to help address obesity among hostel students. It describes obesity as a medical condition caused by excessive food intake and lack of physical activity. The HOSTEL Diet Plan app provides personalized diet plans, activity and weight tracking, meal reminders and recipes, and analytics to help users lose weight in a healthy way. The app aims to target college hostels by starting a trial at one college and then marketing to other colleges through word-of-mouth promotion.