9:41 ●●●●● WiFi 100%

Sudoku Solver

Aim the grid inside the square

Starting camera…

Camera unavailable.
Use “Upload photo” instead.

Upload photo

9:41

Check the digits

Tap any cell to fix mistakes

9:41

Solved

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Detection debug

Long-press the image to save / share this debug capture.

What this mockup shows

Scan — live camera or photo upload, fully on-device.
Review — auto-extracted digits with one-tap correction.
Solved — backtracking solver, originals in black, fills in blue.

No network calls. Digit recognition uses bundled font templates — the iOS port swaps in VNRecognizeTextRequest (Apple Vision).