How to open .ACU files on iOS
To open .ACU files on iOS, open the .acu file from files and tap share..
Step-by-step instructions
- Open the .ACU file from Files and tap Share.
- Send it to a compatible iOS app if Quick Look cannot preview it.
Recommended software
- Textastic
- Kodex
- Files app
Alternative methods
- Open .ACU in a browser-based viewer if desktop apps fail.
- Try opening .ACU on iOS with a secondary app to rule out app-specific issues.
- Convert .ACU only with trusted tools when direct opening is not possible.
Common issues
.ACU file does not open
This usually means the required app is missing or the .ACU file is incomplete.
- Install or update a compatible application.
- Verify the file came from a trusted source and was fully downloaded.
- Try opening the file in an alternative app on another platform.
Security note
Only open .ACU files from trusted senders.