WeChat -

a Chinese multi-purpose messaging, social media and mobile payment app developed by Tencent. First released in 2011, it became the world's largest standalone mobile app in 2018,[2][3] with over 1 billion monthly active users.[4][5][6] WeChat has been described as China's "app for everything" and a "super app" because of its wide range of functions.[7]

User activity on WeChat is analyzed, tracked and shared with Chinese authorities upon request as part of the mass surveillance network in China.[8][9][10][11][12] WeChat censors politically sensitive topics in China.[13][14][15][16] Data transmitted by accounts registered outside of China is surveilled, analyzed and used to build up censorship algorithms in China.[17][12] Due to security concerns, WeChat was banned in India in June 2020.[18] On August 6, 2020, U.S. President Donald Trump signed an executive order banning US "transactions" with WeChat in 45 days.[19]

https://en.wikipedia.org/wiki/WeChat