Twin Sudoku

Twin Sudoku is a calm, clever logic puzzle where stars and moons share the board. Fill every tile, keep each row and column perfectly balanced, and watch the grid click into place. Simple to learn, deeply satisfying to master.

HOW TO PLAY
Fill every empty tile with a star or a moon, following three simple rules:
• Balance: every row and every column has the same number of stars and moons.
• No three in a row: never place more than two identical symbols next to each other, across or down.
• No twins: from Level 7, no two rows (and no two columns) can be exactly the same.

Tap a tile to place a star, tap again for a moon, and long-press to clear it. That's all you need. Every puzzle has exactly one solution and can be solved with pure logic, so you never have to guess.

THREE WAYS TO PLAY
• Levels: an endless journey that grows with you. Start on a small 4×4 board, then move up to 6×6, 8×8 and 10×10 as the puzzles get trickier. New rules unlock along the way.
• Free Play: endless random puzzles whenever you want a quick game.
• Custom Board: choose your board size (4×4, 6×6, 8×8 or 10×10) and your difficulty (Easy, Medium or Hard).

HELPFUL TOOLS
• Hints: stuck? A hint fixes a wrong tile or reveals a correct one. Earn a new hint every time you complete a new level.
• Mistake highlighting: tiles that break a rule glow red, so you can spot errors right away. Turn it off for a purer challenge.
• Undo and restart: try an idea, change your mind, or start fresh at any time.
• Gentle vibration on every tap, which you can switch off in Settings.

WHY YOU'LL LOVE IT
• Infinite levels: the puzzles never run out.
• Always fair: every board is checked to have exactly one solution.
• Bright, cozy design with glossy stars and moons, made for one-handed play on any phone.
• Short sessions: solve a quick 4×4 on a coffee break, or settle in with a 10×10 brain teaser.
• Play offline: no internet connection needed to solve puzzles.
• Your progress is saved automatically on your device. No account or sign-up needed.

A BRAIN WORKOUT THAT FEELS LIKE A BREAK
If you enjoy Sudoku, binary puzzles, Takuzu, nonograms or other grid logic games, Twin Sudoku gives you a fresh twist with the same "aha!" moments. Each solved board trains focus, pattern spotting and logical thinking, without timers pushing you or lives running out.

Twin Sudoku is free to play and supported by ads.

Ready to balance the night sky? Download Twin Sudoku and solve your first board today!