Kaleidoku

See Sudoku in a whole new way.

Kaleidoku is the only Sudoku app that lets you toggle between number mode and color mode mid-game — using color as a deliberate thinking tool. When you're stuck on a number puzzle, switching to colors can reveal patterns your brain missed. It's not just a visual theme — it's a different way of solving.

What makes Kaleidoku different:
- Toggle between numbers and colors at any moment during play
- 4 difficulty levels defined by solving technique, not just cell count
- Daily challenge — one puzzle, same for all players, every day
- Zen sounds and haptic feedback
- Three themes: light, dark, and sepia
- Colorblind-friendly palette with shape symbols
- Lock correct cells to prevent accidental overwrites
- Suggest a feature — we read every one

No account required. No personal data collected beyond optional ad personalization.

Go ad-free for $3.99 — one time, forever.