The File Extensions Database


.AP4 File Extension

  • Category: Audio and sound Files

What is an .AP4 file?

.AP4 is Kids&Us Talking Pen audio

The ap4 file extension is associated with the Talking Pen, an e-learning device that allows kids to learn how to pronounce English properly.

The ap4 file stores audio data for Talking Pen. They can be imported to device from computer via USB.

This ap4 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.


How to open:

Use Kids&Us Talking Pen to playback *.ap4 files.

How to convert:

Conversion to other formats seems to be impossible.

How to solve problems with AP4 files

  • Associate the AP4 file extension with the correct application. On :
    Windows: Right click on any AP4 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.AP4 files". Mac: Right click (or Ctrl-click) the AP4 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .AP4 is Kids&Us Talking Pen audio. Because only the current version supports the latest AP4 file format. Search, therefore, e.g. on the manufacturer website after an available .AP4 is Kids&Us Talking Pen audio update.
  • To make sure that your AP4 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.