https://techcrunch.com/2020/06/15/as-antitrust-investigation-looms-apple-says-its-app-store-facilitated-519b-in-commerce-in-2019/

Amid increasing antitrust scrutiny by U.S. regulators, Apple announced an update on its App Store ecosystem. While the company normally shares some App Store metrics during its WWDC keynote, it’s today detailing the results of a new study that claims the App Store ecosystem facilitated half a trillion ($519 billion) in billings and sales globally in 2019. This is a new and broader figure than has been previously reported, as it includes all transactions the App Store facilitates, not just those on which Apple takes a commission.

The study, which was conducted by economists at the Analysis Group, is the first to attempt to comprehensively analyze the App Store ecosystem, which is now home to nearly 2 million apps. First launched in 2008, the App Store is visited by half a billion people every week across 175 countries. Collectively, users have download apps hundreds of billions of times to their devices. The Apple Developer ecosystem, meanwhile, supports 23 million developers.