Support
Cube Sudoku is a 3D Sudoku game for iPhone and iPad. You can play offline. No account in the app is required.
Contact
Email: patrick@dream-factory.app
Please include your device model, iOS version, and a short description of what you expected versus what happened.
Publisher: Dream Factory (Patrick Schibli), Uster, Switzerland
Website: https://www.dream-factory.app
What is free
You can try the core game without paying:
- the interactive tutorial
- today’s Easy Daily Cube (the same puzzle worldwide)
- undo, redo, notes, timer, and the error display
- starter puzzles on Easy, Medium, and Hard
- a limited number of explained hints per puzzle
- the compact statistics overview
- VoiceOver, Dynamic Type, and Reduce Motion
Full version
A single non-consumable purchase unlocks:
- unlimited new puzzles
- Expert and Master
- the daily Medium and Hard Cubes
- unlimited explained hints
- detailed statistics
There is no subscription and no advertising. Family Sharing is supported.
Restore purchases
On a new device or after reinstalling, open the paywall or settings path that offers Restore Purchases. Sign in with the Apple ID that made the purchase. Family members can use Family Sharing if the organizer enabled it for the purchase.
Ask to Buy
If a family member’s purchase is pending, approve it in the organizer’s Ask to Buy prompt. The app picks up the unlock from App Store transaction updates — you do not need to buy again.
Daily Cube and Game Center
Each UTC day has three Daily Cubes: Easy is free, while Medium and Hard are part of the full version. Each puzzle is generated on device from the UTC date and can be resumed independently. Game Center sign-in is optional and never blocks play. If you are signed in, the app can submit each solved Daily Cube’s ranked time to its matching Easy, Medium, or Hard leaderboard and report achievements.
A missing network connection or a cancelled Game Center dialog only skips the online score. Your local solve and streak still count.
iCloud
If iCloud is enabled for the app, solve history can sync through a private CloudKit zone so statistics return after reinstall. The game on the device remains playable offline. Conflicts keep the better ranked Daily result.
Accessibility
- VoiceOver describes faces, shared edge and corner cells, and the number pad.
- Reduce Motion keeps snap and celebration feedback without unnecessary movement.
- Dynamic Type scales the controls. Very large accessibility sizes are supported; if a control is clipped on a small phone in landscape, rotate to portrait.
Common questions
The cube feels slow at first launch.
RealityKit compiles shaders on the first frame. Later launches and release builds are faster, especially on a real device.
I lost my current game.
Free play and the Daily Cube are separate sessions. Use the menu to jump back to the other mode; each side is saved on its own.
A hint or new game asks me to pay.
The fourth new free puzzle, Expert/Master, today’s Medium or Hard Daily Cube, the fourth hint on a puzzle, and detailed stats are full-version gates. Tutorial, today’s Easy Daily Cube, undo, notes, and the timer stay free.
The purchase does not appear.
Use Restore Purchases, confirm you are on the same Apple ID, and check Screen Time / Ask to Buy. Then contact support with the approximate purchase date.
Requirements
- iPhone or iPad
- iOS / iPadOS 26.4 or later