If we look at the global top-grossing mobile applications of 2021, we can see that PUBG Mobile is the app that generated the biggest revenue of $2.01 billion. It is closely followed by Tik Tok with $1.71 billion and Honor of Kings with $1.64 billion in revenue. Most of PUBG’s revenue comes from China, while Tik Tok generates its revenue primarily from in-app purchases.