Calcudoku: Math Logic Puzzle

Play Calcudoku, the sudoku-style math logic puzzle! Fill the grid so that every row and every column contains each digit exactly once, and every heavily outlined cage combines to its target with +, −, × or ÷. Pure logic, no guessing, and a great way to train your mind.

HOW TO PLAY
• Fill every cell with a digit from 1 to the size of the grid.
• No digit repeats in a row or a column.
• The number and sign in a cage's corner is its target: add, subtract, multiply or divide the digits inside to reach it.
• A cage with no sign is a given digit.
• Every puzzle has exactly one solution.

FEATURES
🧩 240 puzzles in 4 levels, from a relaxed 4×4 Easy grid to a big 9×9 Expert challenge
📅 A new daily puzzle, and streaks to keep you coming back
✏️ Pencil notes with smart clean-up, plus one-tap auto notes
💡 Hints when you are stuck, and undo for every move
✅ Optional mistake highlighting and a check button
🏆 Ranks from Novice to Master, XP, stars and 17 achievements
⏱️ Timer, best times and statistics for every level
🎨 4 beautiful boards: Ivory, Jade, Walnut and Obsidian
🌍 14 languages
📱 Made for iPhone, iPad and Android phones and tablets
📴 Works fully offline, no Wi-Fi needed

FOR EVERY KIND OF SOLVER
New to Calcudoku? The short tutorial teaches the rules in a minute, and the Easy puzzles need no guessing at all. Already a fan of sudoku or math puzzles? The Expert 9×9 grids use long chains of reasoning.

FREE TO PLAY
Calcudoku is free with ads. A one-time purchase removes all ads and gives you unlimited hints.

Calcudoku is also known as Mathdoku and as arithmetic Latin square puzzles. It is a brain training puzzle game for adults that works offline with no Wi-Fi. Download it and start calculating!