Kaleidoku

Toggle between number and color mode mid-puzzle — and unlock a new way to solve. Free to play. Now on the App Store.

Kaleidoku is Sudoku, reimagined in color.

Replace digits with vibrant colored marbles and activate a completely different part of your brain. Stuck on a number? Toggle to color mode mid-puzzle and watch the solution reveal itself.

THE CORE MECHANIC Switch between number and color mode anytime during a puzzle. Players who feel stuck on numbers often break through instantly in color — and vice versa. It's like getting a hint from your own brain.

PLAY YOUR WAY • Free to play — all puzzles included • Easy, Medium, Hard, and Expert difficulties • Daily Challenge — same puzzle worldwide, every day • Dark, Sepia, and Light themes • Colorblind-friendly mode with shape symbols

CLEAN & FOCUSED No accounts. No logins. Just you and the puzzle.