There are 18 other file types using
the APP file extension!
.app - Mac application package or core system service [common]
.app - Lotus Symphony add-in application
.app - dBase application generator object
.app - DR-DOS executable application
.app - Visual FoxPro application
.app - Alphacam punch post
.app - ArcPad project file
.app - Timex Data Link USB application
.app - GEM application bundle
.app - CA Visual Objects platform for developer (CAVO) project
.app - Clarion for Windows application
.app - Cybiko computer application file
.app - Team Developer normal mode application
.app - OrbWorks PocketC CE application
.app - Symbian OS application
.app - ThecusOS application
.app - Atari picture image
.app - HarmonyOS App Package
APP file extension - Psion OVAL data
What is app file? How to open app files?
File type specification:
The app file extension is related to the Psion OVAL.
It is a rapid development environment for hand helds - quick, cost-effective programming.
One of the great things about the Psion computers is how easily they can be programmed.
This can be done on the Psion machine itself (using the built-in OPL editor) or by using a PC-based software development kit (SDK), software development environment (SDE) or Psion 'emulator'.
This app file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.