iOS platform restriction
iOS does not allow GPU operations when apps are in the background. This is an Apple platform restriction, not a NeatPass limitation.
Technical Explanation
GPU Processing
NeatPass uses the GPU (via Apple's Metal framework) for fast AI processing
Background Suspension
When you switch to another app, iOS suspends GPU access immediately
Computation Stops
Any in-progress AI computation must stop
What Happens If You Leave
Processing pauses safely, your data is not lost
NeatPass saves your progress automatically
When you return, you'll be prompted to continue or start fresh
Why Apple Does This
Preserves battery life
Prevents background apps from hogging GPU resources
Ensures smooth performance for the foreground app
Tips for Best Results
Extraction usually takes around 20 seconds per ticket. Keep NeatPass open during this time.
Stay in app
Keep NeatPass visible during extraction.
Don't lock
Don't lock your phone or switch apps.
Progress saves
If you must leave, your progress will be waiting when you return.
Edge cases
In rare cases, iOS may terminate the app before progress can be saved. If this happens, just try again. No data is lost since nothing was saved yet.
Related
Learn about the on-device AI model that requires GPU processing. Processing works fully offline. If extraction fails, see troubleshooting extraction problems.