How to open APP4 files
Did your computer fail to open an APP4 file? We explain what APP4 files are and recommend software that we know can open or convert your APP4 files.
What is an APP4 file?
The APP4 file extension indicates to your device which app can open the file. However, different programs may use the APP4 file type for different types of data.
While we do not yet describe the APP4 file format and its common uses, we do know which programs are known to open these files, as we receive dozens of suggestions from users like yourself every day about specific file types and which programs they use to open them.
We are continually working on adding more file type descriptions to the site, so if you have information about APP4 files that you think will help others, please use the Update Info link below to submit it to us - we'd love to hear from you!
Various APP4 openers
These apps are known to open certain types of APP4 files. Since many different programs may use APP4 files for different purposes, you may need to try a few of the apps to open your specific APP4 file.