The App Store is a digital distribution platform developed and maintained by Apple Inc., for mobile apps on its iOS operating system. The store allows users to browse and download apps developed with Apple's iOS software development kit. Apps can be downloaded on the iPhone smartphone, the iPod Touch handheld computer, or the iPad tablet computer, and some can be transferred to the Apple Watch smartwatch or 4th-generation or newer Apple TVs as extensions of iPhone apps.
As of January 2017, the store features over 2.2 million apps.[Citation needed] Since its 2008 release, App Store has generated over $70 billion in revenue for developers.[Citation needed]
The iPhone App Store opened on July 10, 2008 with an initial 500 applications available. On July 11, the iPhone 3G was released and came pre-loaded with support for App Store.