App.

About App

The HarmonyOS App Pack or the App file, identified with the file extension .app, is the file format used by the HarmonyOS operating system. It functions as a native HarmonyOS app for distribution and installation through Huawei AppGallery, or for distribution through Huawei Ability Gallery in respect of installation-free apps under both former classic dual-framework and current HarmonyOS Next system of unified OpenHarmony app framework. The App file is also used by a number of other open source HarmonyOS-based operating systems such as OpenHarmony and Oniro-based operating systems for distribution and installation of applications, video games and middleware. Including non OpenHarmony-based operating systems, such as GNU Linux-based Unity Operating System that supports the app file format.