What is the APP File Extension?

Writer:   |   Updated: November 26, 2018

Microsoft Silver

APP File Summary

The APP File Extension has eight different file types (mostly seen as the Symbian OS Application format) and can be opened with ten distinctive software programs, with the dominant related application developed by Nokia (Symbian OS software). These files can be categorized as Executable Files, Plugin Files, or Data Files. In the majority of cases, these files will be Executable Files.

APP files are found on both mobile and desktop platforms and can be opened using Symbian OS, Windows, and Mac operating systems. With a Popularity Rating of "Low", these files are not very common to your average computer user.

If you would like to learn more about APP files and the software that opens them, please see the additional detailed information below. Also, you can learn how to do some basic APP file troubleshooting if you are having trouble opening these files.

Low
Prevalence
7948
Order

/ 11690

Active

File Status

26

November

2018

Edited

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Sorts of APP Files

  8 known file types use this extension

Chief APP Description

.APP
File ID:.app
Group:Symbian OS Application

Application file associated with Symbian OS, an operating system for cell phones developed by Nokia. An APP file allows to comprise a Symbian application together with a .RSC resource file. This could be achieved by using a Symbian OS software development kit (SDK).

Author: Nokia
Kind:Executable Files
Registry Key: HKEY_CLASSES_ROOT\.app

Software Programs That Open The Symbian OS Application:


Symbian OS by Nokia

Symbian OS

Nokia Carbide.c++ by Nokia

Windows

Symbian SDK by Nokia

Windows

Additional APP Files

.APP
File ID:.app
Group:FoxPro Generated Application

File generated by Visual FoxPro when a new program is built, using a project (.PJX) file through the BUILD APP command.

Author: Microsoft Corporation
Kind:Executable Files

Software Programs That Open FoxPro Generated Application Files:


Microsoft Visual FoxPro by Microsoft Corporation

Compatible with:

Windows
.APP
File ID:.app
Group:Mac OS X Application

Executable file associated with Mac OS X operating system, such as .EXE files for Microsoft Windows operating system. APP files are Mac OS packages, you can right-click (or control-click) an application and select "Show Package Contents" to view the files contained in the package.

Author: Apple
Kind:Executable Files

Software Programs That Open Mac OS X Application Files:


Apple OS X by Apple

Compatible with:

Mac
.APP
File ID:.app
Group:Lotus Symphony Add-in Application

Add-in file for Lotus Symphony, an integrated software package for creating and editing text, spreadsheets, charts and other documents on the MS-DOS operating systems. This format seems to be obsolete.

Author: IBM
Kind:Plugin Files

Software Programs That Open Lotus Symphony Add-in Application Files:


IBM Lotus Symphony by IBM

Compatible with:

Windows
Mac
Linux
.APP
File ID:.app
Group:dBASE Application Object File

Object created by dBase, a database engine, a form engine and database programming language.

Author: dBase, LLC
Kind:Data Files

Software Programs That Open dBASE Application Object File Files:


dBase by dBase, LLC

Compatible with:

Windows
.APP
File ID:.app
Group:Alphacam Punch Post

CAD file associated with Alphacam, a leading CAD/CAM software solution for the Woodworking industry. It contains punch post data file generated by the software.

Author: Planit Solutions, Inc.
Kind:CAD Files

Software Programs That Open Alphacam Punch Post Files:


Planit Alphacam by Planit Solutions, Inc.

Compatible with:

Windows
.APP
File ID:.app
Group:ArcPad Project File

Project file created by ArcPad, a mobile field mapping and data collection software designed for GIS professionals.

Author: ESRI
Kind:GIS Files

Software Programs That Open ArcPad Project File Files:


ArcPad by ESRI

Compatible with:

Windows
Windows Phone
.APP
File ID:.app
Group:Timex Data Link USB Application File

Data file associated with Timex Data Link USB, an utility for importing schedules from the web into your watch.

Author: Timex Group USA, Inc.
Kind:Data Files

Software Programs That Open Timex Data Link USB Application File Files:


Timex Data Link USB Software by Timex Group USA, Inc.

Compatible with:

Windows

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APP Demand


Operating System Rankings

Windows (82.33%)
Android (11.56%)
iOS (3.43%)
Macintosh (1.71%)
Linux (0.60%)

Popular Devices

Desktop (84.34%)
Mobile (14.29%)
Tablet (1.37%)


Troubleshoot APP Files


Troubles Opening APP Files

Symbian OS Disappeared

When you double-click your APP file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". Generally, this is experienced in %%os%% because Symbian OS isn't installed on your PC. The typical path of opening your APP with a double-click won't work because %%os%% cannot make the program connection.


Tip: When you have another program installed that you know will open your APP, you can select it from the other programs listed (see "Show Apps").


Wrong Version of Symbian OS is Installed

In other instances, your Symbian OS Application file version may not be supported by your version of Symbian OS. You will need to download a newer version of Symbian OS if you don't have the right version. This issue mainly occurs when your Symbian OS Application file was created by a newer version of Symbian OS than you have on your PC.


Tip: Sometimes you can get a clue about the version of APP file you have by right clicking on the file, then clicking on "Properties" (Windows) or "Get Info" (Mac OSX).


Summary: Not having the right Symbian OS version on your computer can cause problems opening APP files.


Additional APP Opening Issues

You can still experience errors opening APP files even with the latest version of Symbian OS installed on your PC. There can be other issues - unrelated to software - preventing you from opening APP files. Other contributing causes:

  • APP file references in the Windows Registry are broken
  • Unintentional removal of the description of the APP file inside the Windows Registry
  • Incomplete or bad installation of a software application associated with the APP format
  • Your APP can't be loaded properly (file corruption)
  • Your APP is infected with malware
  • Drivers associated with APP software need to be updated
  • Your PC doesn’t have enough available resources to open the Symbian OS Application file

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