Market intelligence analyst Sensor Tower has estimated that Fortnite has amassed over US$500 million in revenue in less than a year on iOS alone. The battle royale smash hit from Epic Games has been making about US$1.53 million a day since it was released on the App Store. Android gamers have contributed another US$100 million on top of that.
https://www.notebookcheck.net/Fortnite-rakes-in-US-500-million-on-iOS-in-less-than-a-year.406231.0.html