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Describe what happened. The app version, iOS version and iPhone model help us investigate.
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Support
If a digit was not recognised correctly or you have a question, start with these quick checks or contact the developer.
For a clean scan.
Keep the full 9×9 grid visible, use even lighting and hold the iPhone parallel to the puzzle.
Quick help
Things to check.
Most scan issues are solved by a steady image and visible outer edges.
The Sudoku is not found.
Show all four outer edges, avoid reflections and keep the iPhone parallel to the puzzle.
A digit is wrong or unclear.
Use Correct Recognition and change only the affected cells.
Why does SudoFlash need the camera?
The camera is used only to capture the Sudoku. Processing happens on the device.
How do I manage a subscription?
Open Settings → Manage Subscription in SudoFlash or use Apple’s subscription settings.