Killer application
A killer application (often shortened to killer app) is any software that is so necessary or desirable that it proves the core value of some larger technology, such as its host computer hardware, video game console, software platform, or operating system.[1] Consumers would buy the host platform just to access that application, possibly substantially increasing sales of its host platform.[2][3]
"Killer app" redirects here. For the video game, see Tron 2.0: Killer App.