The document summarizes key developments in the 4-year history of the Apple App Store:
- The number of available apps has grown from 500 at launch to over 650k currently, though 334k apps have also been removed.
- The US initially dominated downloads but has lost some share to growing Asian markets like China and Japan in recent years.
- While total downloads increased, average downloads per app among the top 200 has declined from 15.4 to 8.4 as the store has become more fragmented.
- Revenues have grown due to the rise of in-app purchases, now generating 68% of revenue among top grossing apps compared to 7% four years ago.