The number of obese people worldwide has nearly tripled since 1975. Worse still, more young people nowadays are prone to obesity. In fact, this phenomenon has caused some global concerns. People who are obese and overweight have low motivation to ameliorate the problems they are facing because a diversity of fast food is constantly advertised on social media, and people, which can easily disturb their diet plan. This project aims to help obese teenagers aged from 10 to 20 years old to change their lifestyle and enhance their motivation of doing exercises. There will be an interactive app with workout games for multiple players, a customized health plan, and social tips sharing. Infographic leaflets, posters, and advertisements on social media will be published.