App store

An app store (or app marketplace) is a type of digital distribution platform for computer software, often in a mobile context. Apps provide a specific set of functions which, by definition, do not include the running of the computer itself. Apps are designed to run on specific devices, and are written for a specific operating system (such as iOS, Mac OS X, Windows, or Android). Complex software designed for use on a personal computer, for example, may have a related app designed for use on a mobile device.