killer application; killer app
A computing term for a must-have application that drives adoption of a platform or device. Often abbreviated as キラーアプリ.
See also: キラーコンテンツ
このゲームはそのゲーム機のキラーアプリケーションだった。
This game was the killer app for that console.
Spreadsheet software became the killer application that popularized personal computers.