Binairo - Binary Logic Puzzle

Only three simple rules. Fill the grid with 0s and 1s — no luck, no math. Every puzzle has exactly one solution, so pure logic always gets you there. New daily challenge.

Fill the grid with 0s and 1s. Just three simple rules. Binairo — also known as Takuzu or Binary Puzzle — is pure logic. No luck, no math. A calm, beautifully minimal way to sharpen your mind, anytime, anywhere.

■ How to play Put a 0 or a 1 in every cell. Follow three rules and fill the whole board:

• Never three of the same number in a row or column
• Each row and column has an equal count of 0s and 1s
• No two rows and no two columns are identical No prior knowledge needed — most people are playing within minutes.

■ Features

• Always solvable by logic: every puzzle is verified in-app to have exactly ONE solution, so you never have to guess.
• Four difficulties: from a gentle 6x6 to a demanding 12x12.
• Daily Challenge: everyone plays the same puzzle each day, with streaks and a calendar to keep the habit going.
• Two display styles: numbers (0/1) or two-color stones — your choice.
• Gentle assists: mistake highlighting, remaining counts, undo, and hints.
• Fully offline: play anywhere, even with no signal.
• Private by design: your records stay on your device.

■ Great for you if…

• You've mastered Sudoku and want your next logic fix
• You love pure logic with zero luck involved
• You're tired of cluttered, ad-heavy, subscription puzzles
• You want a calm mental reset on the commute, on a break, or before bed
• The idea of 0s and 1s makes you smile

■ Privacy & peace of mind

• No account or sign-up required.
• No servers, no cloud — the app is fully offline.
• Your play records are stored only on your device and are never uploaded.