.app is an abbreviation of the word application. It may refer to:
Filename extensions edit
- Used in GEM
- Used for application bundles in NeXTSTEP, OPENSTEP, GNUstep, macOS, iOS, and iPadOS
- Used for app packages in HarmonyOS
- Used in SkyOS
- Used in Symbian OS
- Used in Microsoft Windows (via AppWave)
Other uses edit
- .app (gTLD), a top-level internet domain