An app is an application
App is the abbreviation of application, and is mainly used to identify an application on a smartphone. It actually means application and exists since there are computers, but with the advent of Apple's ITunes store it's an abbreviation that the general public has embraced. An app can be useful (think of showers radar, or the Nu.nl app) but is also often just for entertainment (WordFeud, Angry birds). Sometimes it costs an app for mobile phone money (from 0.79 to 11.99), but very much there are also free.
What is an App [YouTube] iKoDnGTzu6w [/youtube]