Mac OS X Application
If you need to edit the APP file, one of the safest methods is to download and install the software dedicated to working with APP files. Of course, there are probably APP Online Editors available, but none of them will be able to provide such a wide range of available options as dedicated software.
Please note that not every program that supports APP will allow you to edit the file. Additional information about the APP file extension can be found here.
This is definitely the surest way. Choose one of the programs that support the APP file extension, open your file and check the editing options. The most proven method is to download the installer from the developer's website. Links to the websites of software producers can be found on the software subpages. List of sample programs supporting the APP file below.
All available programs supporting the APP file
Most of the file formats are simply text format saved under a different extension - so you can open them e.g. with Windows Notepad However, such manual editing of the APP file or any other file may result in damage to the file. After saving the changes, it may not be possible to reopen the APP file. By far the safest way is to use file editing programs that works with the APP extension.
It seems that one of the software on the list must be able to edit the APP files. Use other options if you still haven't found a way to edit APP. Verified websites with the option to edit the file in the APP format below.
Free Online File Edit Service
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