Cirdoku: Circular Sudoku

Cirdoku is Sudoku, reimagined on a circular grid.

Instead of a square board, you work with concentric rings divided into radial sectors. Place the numbers so that no digit repeats within any ring or any sector. The logic is the same. The shape changes everything.

HOW IT WORKS
• Classic boards use 4 concentric rings x 8 sectors, 32 cells to fill
• Each ring must contain all its numbers, with no repeats
• Each sector must contain all its numbers, with no repeats
• Find the one arrangement that satisfies every constraint at once

SIX WAYS TO PLAY
• Classic: the pure circular Sudoku puzzle
• Daily Challenge: a new themed board every day, with its own twist and difficulty
• Hue: the same puzzle with no numbers at all, solved entirely by color
• Dial: drag whole rings to spin them and match par, scored by turns and medals
• Journey: work through a progressing series of boards
• Endless Mode: keep playing, with a new puzzle every time you solve one

FEATURES
• Handcrafted puzzles across multiple difficulty levels
• Built-in Hint system: get unstuck without breaking immersion
• Solver mode to reveal the solution step-by-step when needed
• Notes, mistake tracking and restart on any board
• Fractal Zoom win animation: a satisfying reward for completing a puzzle
• Clean, distraction-free interface with smooth circular interactions
• Calm ambient soundtrack

WHY CIRDOKU?
The circular format isn't just a gimmick. It fundamentally changes how you scan for conflicts and build chains of deduction. Patterns that were automatic in square Sudoku need to be relearned. It's a fresh challenge even for experienced puzzlers.

PLAY WITHOUT PRESSURE
Every puzzle mode is playable without a subscription. If you want help without managing credits, Cirdoku Plus is a single one-time purchase for unlimited hints, with restore support on your store account.

If you've mastered square Sudoku and want something that feels genuinely new, Cirdoku is your next step.