By 2019, it had made over one billion sales in sporting goods and ranked fourth in the sporting goods category on the online retail website Tmall behind Decathlon, Lululemon Athletica, and Yijian Running Machine. Keep's four streams of revenue are sporting goods, advertising, its Keepland gyms, and app membership. English, German, Japanese, and Spanish are several of the app's supported languages. In 2019, the app has 18 non-Chinese-language versions and has 10 million users who are not based in China. By September 2019, Keep had reached 200 million users. Keep is installed by default on devices in Apple Stores in China and was on Apple's '2015 Best of App Store list'. CEO Tim Cook travelled to China on 21 March 2017, he visited Keep's office in Beijing and praised the company for reaching 80 million downloads. As China was experiencing economic deceleration, Keep in October 2019 laid off 15% of its workforce after having increased it by fourfold in 2018.

In July 2018, it received $126 million in Series D funding from Goldman Sachs, Tencent, GGV Capital, and Morningside Venture Capital. The company opened the brick-and-mortar gyms with the goal of nurturing brand loyalty by having online users start in-person relationships. China has 11 Keep-owned gyms, called Keepland, with nine located in Beijing and two in Shanghai. In March 2018, Keep opened a gym in Beijing, its first. Keep received US$10 million in Series B funding from GGV Capital and US$32 million in Series C funding from Morningside Ventures and GGV Capital, with participation from Bertelsmann Asia Investments. To make users more committed, it uses 'daily bonus, self-evaluation, and personalized fitness plan recommendation'. Its GPS feature allows users to find nearby joggers who are also using the app to whom they can direct friend requests. It lets users monitor where and for how long they have run. The app contains a social networking service that allows users to upload images of what they have eaten, what they look like, and what their exercise routines are. Keep provides users with fitness videos and an e-commerce store where they can buy exercise equipment through WeChat Pay and Alipay. More than one million users downloaded the app by the 105th day after its launch. Keep became available for downloading on 4 February 2015.

He chose the name 'Keep' because according to Xinhua News Agency, 'he believes keeping, or persistence, is the core of losing weight and starting up a company'. Wang said his motivation for creating the app stemmed from his losing 20 kilograms (44 lb) after he developed an exercise regimen through online research. Keep is an app created by the company Beijing Calories Technology Co Ltd which was founded in 2014 by Wang Ning, a college student in his fourth year.

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