LESS COPYING. MORE DISCOVERY.
From paper
to solved.
Point your camera at a puzzle. Check the clues.
Let the complete GridPuzzle engine do the rest.
Bring a puzzle
Choose a type for the next scan, or apply it to the current board below. Automatic cannot infer invisible variant rules.
Grid size & settings
The full deduction hierarchy is retained. Search never runs on the interface thread.
Save, import & install
First use needs an internet connection.
On iPhone: Safari → Share → Add to Home Screen → Open as Web App. Photos stay on this device and are not uploaded. Your last puzzle is saved locally; photographs are not saved.
Your puzzle
Keep the entire grid in view. Hold steady or tap Capture.
Drag the four corners onto the grid’s outside corners. Exclude titles and margins. Set the row/column count before reading.
Select the cells of a cage. Saving replaces any intersecting cages.
Tap the smaller cell, then its larger neighbour.
A unique solution verifies these clues—not the accuracy of the photograph’s transcription.
Advanced puzzle data
A data-only format for all eleven families. Cells are zero-based row-major indexes; null is blank, # is blocked, and Slitherlink 0 is a clue.