Domidoku
Puzzle
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Dominoes meet Sudoku on one board. Place every tile so no number repeats in a row, column or box. Five difficulties and a fresh puzzle every day.
Dominoes meet Sudoku on one board.
Every puzzle is a 9×9 Sudoku grid, but you don't fill it one digit at a time. You place dominoes, two numbers locked together, and both halves have to land correctly. One tile, two constraints, and usually only one square where it can possibly go.
If you like Sudoku, you already know the rules. You've just never solved it like this.
HOW IT WORKS
• The Sudoku rule you know: 1 to 9 once per row, once per column, once per 3×3 box.
• The grid starts partly filled. The rest waits in your tray as dominoes.
• Work out where each tile belongs, then drop it in.
• Three mistakes and the puzzle is over. Finish without a single one for three stars.
FIVE DIFFICULTIES
Beginner asks you to place 12 dominoes. Pro asks for 27, with far fewer numbers on the board to start from. Intermediate, Advanced and Expert sit in between. Each tier unlocks as you win at the one below, so the ladder opens up at your pace rather than all at once.
A NEW PUZZLE EVERY DAY
One daily puzzle, the same board for every player in the world. A calendar marks every day you've solved, keeps your streak, and lets you go back and pick up the days you missed.
TOOLS THAT RESPECT YOUR TIME
• Notes for pencilling in candidates before you commit.
• Hints for when the board stops making sense.
• Reorder your tray so the tiles sit the way you think.
• Games save themselves. Close the app in the middle of a puzzle and it reopens exactly where you left it.
• iCloud keeps your progress, streak and stats in step across iPhone and iPad.
• Sound, music and haptics each switch off independently. Play in silence if you like.
• A quick tutorial and a full How to Play, both there whenever you want them.
NO CONNECTION REQUIRED
Puzzles are generated on your device, not downloaded. Play on a plane, on the metro, in a basement. It all works the same.
FREE TO PLAY
Domidoku is free. Hint packs are there if you want them, and a single purchase removes ads permanently. Nothing is on a timer, and nothing locks you out until tomorrow.
Built for iPhone and iPad.
Made by Carré. Questions, bugs or ideas: hello@playcarre.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixes and polish, plus one change worth knowing about.
ON IPAD
Every screen now scales to the iPad you are actually holding. The tray sits square with the board, the top bar no longer presses against the wooden frame, the shadow under the tray fades away instead of ending on a hard line, and Settings reads as a sheet rather than a wall of oversized bars.
STARTING A NEW PUZZLE
Beginning a new puzzle, or opening today's Daily, now asks you to be online. A game already in progress still resumes offline, and so does the tutorial. Remove All Ads lifts the requirement entirely.
FIXED
• Hints bought while a game was open could disappear the moment you spent one. Your balance now stays correct everywhere, including a purchase made on another device.
• Remove All Ads is honoured offline. Paying to take the ads away no longer leaves you waiting for a connection.
• Continue on the home screen could close the app when there was no saved game. It now sits dimmed until there is one to return to.
• When no ad is available, the hint is granted anyway instead of the request quietly failing.
• Out of Hints offers all three hint packs, not only the smallest.
• Pause no longer breaks the word Intermediate across two lines.
Questions, bugs or ideas: hello@playcarre.com
The developer, 1596505 B.C. LTD, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 1596505 B.C. LTD
- Size
- 31 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $4.99
- 100 hints $10.99
- 20 hints $2.99
- 5 hints $0.99
- Copyright
- © 2026 1596505 B.C. Ltd.