Calcudoku - Math meets Sudoku

Six difficulty tiers, shareable puzzle codes, no ads, no IAP. Take 60 seconds to learn, then beat a friend's score.

A logic puzzle where math meets Sudoku.

Take 60 seconds to learn — let's play a tiny 3×3 together. Then climb the six difficulty tiers, from Easy 4×4 up to Master 9×9. No accounts, no ads, no IAP. Just numbers, cages, and your next best score.

Cages tell you the math. Each cage shows a target and an operator — fill it with digits that obey the clue while keeping every row and column free of repeats. Single-cell cages are gifts; the clue is the answer. Lock in answers, scribble notes, mark possibilities, and rule out impossibles.

Grab a puzzle code and try to beat a friend. Every puzzle has a short share code — paste it in, play the same board, and let your best score speak for itself. Per-size local leaderboards keep your bests honest across all six tiers.

• 6 difficulty tiers — 4×4 through 9×9 • 11-step in-game tutorial — replay any time from the menu • 3 lives, 5 hints, time-decaying score with a life bonus • Notes mode — mark possible and impossible candidates • Shareable puzzle codes — challenge a friend on the same board • Per-size best scores leaderboard • Haptic feedback on number placement • Plays great offline

Report bugs or share a puzzle: contact@texaspfcg.com