Ringdoku: Logic & Numbers

Everything fits. You just have to discover how.
Ringdoku is a number logic puzzle with a circular board and two simple rules. Study the cells, follow the clues, and complete every ring.
TWO RULES. MANY POSSIBILITIES.
• Fill each ring with the indicated numbers, without repeating any.
• Cells sharing an edge cannot contain equal or consecutive numbers, even across different rings.
For example, a 3 cannot touch a 2, another 3, or a 4. The lowest and highest numbers may touch. Cells that meet only at a corner are not neighbors.
FROM ONE RING TO FOUR
Explore 200 levels, from very easy to very hard. Start with simple boards and discover new connections as the number of rings grows.
Each puzzle invites you to observe, eliminate possibilities, and deduce the next number.
A FRESH CHALLENGE EVERY DAY
Complete the daily puzzle and build your streak. Daily progress is saved separately, so you can switch between your daily challenge and campaign levels.
SPACE FOR YOUR IDEAS
• Add candidate numbers as notes.
• Select a cell to highlight its neighbors.
• Spot conflicts through color feedback.
• Erase numbers and undo moves.
• Get a hint by watching a rewarded video when available.
PLAY AT YOUR OWN PACE
Enjoy a minimalist design, soft colors, and simple controls. Automatic saving lets you pick up where you left off.
Available in English, Spanish, Portuguese, German, and French.
Enjoy sudoku and other deduction games? Discover a different kind of brain teaser, with circular boards and rules of its own.
Ringdoku. A moment to think. One ring at a time.