A new dimension of logic

Sudoku, in every direction.

Solve one familiar 9×9 slice at a time. Every move connects three boards inside a single 9×9×9 puzzle cube.

Coming soon to the App Store See how it works

No adsNo accountsFully offline

Familiar rules. Deeper connections.

Focus on one board—or see the whole cube.

Switch between clean 2D slices and an interactive 3D view. Rotate the cube, change axes, and follow the three lines that constrain every cell.

Each axis contains nine complete Sudoku boards, all sharing the same 729 cells.

Easy, Medium, Hard, and a shared daily puzzle—with notes, undo, auto-candidates, and flexible error checking.

Your puzzles, settings, and progress stay on your device. S3DOKU has no ads, analytics, accounts, or tracking.

Need a hand?

For questions, bug reports, or purchase help, open a support request on GitHub. Please do not include private or financial information.