20 Music streaming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Ma...
https://www.apple.com/newsroom/pdfs/the-success-of-third-party-apps-on-the-app-store.pdf