"Keep" is a mobile fitness tool App focusing on fitness, developed by Beijing Calorie Information Technology Co., Ltd. ... Keep provides real-life synchronous training of video courses, users can choose courses according to their interests, and advanced fitness users can also DIY fitness content. Keep has certain social attributes, and users can communicate and discuss with each other. 1 The product has been launched on major platforms, and users can download it in the App Store and Android channels. In the Internet age, fitness culture is awakening, and there should be more professional tools and purer communities to make fitness easier. Keep focuses on the application development in the field of mobile sports, advocates the spirit of openness, does not imitate, does not follow the trend, and only makes cool products.