A report from analytics firm App Annie has stated that the iOS App Store has made revenue of over US$130 billion from July 2010 to December 2017. The report offers a number of incredible statistics, including the fact that 170 billion downloads were made between the same dates mentioned above, and that there are now over two million live apps available on the App Store.
https://www.notebookcheck.net/The-iOS-App-Store-made-over-US-130-billion-since-July-2010.306404.0.html