.app

.app is a short form of the word application often used in the IT sector. It may refer to:


 * .app (gTLD), a top-level internet domain

Filename extension

 * Used in GEM
 * Used in GNUstep
 * Used in iOS
 * Used to identify macOS application bundles
 * Used in SkyOS
 * Used in Symbian OS
 * Used in Microsoft Windows (via AppWave)