Two symbols, one simple rule, and a puzzle you can play forever. Fill the grid with suns and moons — never three in a row — and let the deductions click into place. Unlimited boards, a fresh one every day, always solvable by logic.
Download on the App Store Free to play, with an optional one-time Remove Ads unlock · iPhone & iPadTango — also known as Binairo or Takuzu — is a deceptively simple logic puzzle. You fill a 6×6 grid with two symbols, a sun and a moon, following a handful of small rules. From those rules an entire chain of clever deductions unfolds, square by square.
Tango Unlimited gives you as many boards as you want, plus a brand-new daily puzzle the whole world solves together. And here's the part that matters most: every puzzle is generated and verified to have exactly one solution you can reach by pure logic — you should never have to guess.
No account, no sign-in, no internet required. Just you and the grid.
No — that's the whole point. Every puzzle is checked to have one unique solution reachable by logic alone. If you're stuck, the answer is always a deduction away, and a hint can show you which one.
Easier boards start with more given symbols and need only the basic rules. Harder boards reveal less and require deeper chains of reasoning — but they're all solvable without guessing.
Yes. Everyone gets the same board each day, and solving it keeps your streak alive. There's also an endless Unlimited mode whenever you want more.
They sit between two neighboring cells. An = means the two cells share the same symbol; an × means they must be opposite. They're powerful clues for cracking a board.
Yes — choose System, Light, or Dark in Settings.
Tango Unlimited is free to play and supported by ads. Removing them is a single one-time purchase — pay once, yours forever. No subscription, no recurring charges, and no puzzles locked behind a paywall.
Payment is charged to your Apple ID at confirmation of purchase. Already bought it? Use Restore on the Remove Ads screen to bring it back on any of your devices.
Purchases are also governed by Apple's standard Terms of Use (EULA).
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Email — wuyuping38@gmail.com
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