# Duono: Binary Logic Puzzle — Tricky Binary Puzzle, Tango > Tricky binary logic puzzle game with sun and moon theme, offline play, and Game Center. (iPhone/iPad app by Fatma Nur Usluer.) - Source: https://appshunter.io/ios/app/duono-binary-logic-puzzle/id6745228046 (this page in markdown: same URL + `.md`) - Developer: [Fatma Nur Usluer](https://appshunter.io/developer/1811406191) - Category: Games, Entertainment, Board, Puzzle - Price: $2.99 (on sale, was $3.99) - Rating: 4.00/5 from 1 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 23 MB - Languages: American English, French (France), German (Germany), Indonesian, Italian, Japanese, Malay, European Portuguese, European Spanish, Thai and 1 more - Released: 2025-05-08 - Data updated: 2026-08-17 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/duono-binary-logic-puzzle/id6745228046/reviews.md ## What is Duono? DUONO - BINARY LOGIC MASTERY Experience the ultimate tricky binary puzzle adventure! Duono combines beautiful sun and moon symbols with challenging tango-style logic patterns that will test your mind and keep you coming back for more. WHAT MAKES DUONO SPECIAL: • Unique Sun & Moon Theme - Beautiful symbols replace boring numbers • Full Game Center Integration - Compete globally, unlock achievements • 100% Offline Gaming - Perfect for anywhere, anytime play • Ad-Free Experience - Pure puzzle focus, zero interruptions • Perfect 6x6 Grid Size - Ideal challenge level for all skill levels • 11 Language Support - English, Turkish, French, German, Italian, Portuguese, Spanish, Japanese, Thai, Indonesian, Malay CORE GAME FEATURES: • Tricky tango-style binary logic patterns • Simple rules: 3 suns, 3 moons per row/column • No more than 2 identical symbols touching • Constraint symbols (= and ×) guide your solving • Pure logic - no guessing required! GAME CENTER INTEGRATION: • Global Leaderboards - See your world ranking • Achievement System - Unlock rewards for progress • Friends Challenges - Connect and compete • Cross-Device Sync - Your progress follows you DIFFICULTY LEVELS: • Easy Mode (15-18 starting hints) • Medium Mode (12-15 starting hints) • Hard Mode (5-7 starting hints) • Clever Mode (3-5 starting hints) • Random Mode (Surprise difficulty) KEY FEATURES: • Smart Hint System - Get unstuck without frustration • Unlimited Undo - Perfect your strategy • Pause & Resume Timer - Play at your own pace • Game History Tracking - Review your progress • Dark & Light Themes - Easy on your eyes • Custom Settings - Tailor your experience PERFORMANCE TRACKING: • Move Counter - Track your efficiency • Time Tracking - Beat your best times • Score System - Performance-based scoring • Progress Statistics - See your improvement • Achievement Progress - Visual goal tracking INTERFACE HIGHLIGHTS: • Clean, Minimalist Design • Intuitive Touch Controls • Visual Error Highlighting • Smooth Animations • Accessibility Support • Portrait & Landscape Support PERFECT FOR: • Logic puzzle enthusiasts seeking fresh challenges • Binary puzzle fans wanting ultimate experience • Brain training during commutes or travel • Anyone who loves strategic thinking games • Players seeking ad-free, quality gaming WHY PLAYERS LOVE DUONO: "Finally, a unique binary puzzle without distractions!" "The sun and moon theme is brilliant and engaging" "Perfect difficulty progression keeps me hooked" "Love competing with friends through Game Center" "Best offline puzzle game for my daily commute" GAME MECHANICS: • First tap places a sun symbol • Second tap changes to moon symbol • Third tap clears the cell • Fixed cells provide starting clues • Logical deduction solves every puzzle • No luck or guessing required Ready to master the art of binary logic? Download Duono today and discover why thousands of players are addicted to these beautifully crafted tango-style puzzles! Perfect your strategy. Challenge your mind. Become a Duono master. ## Key features - Unique Sun & Moon Theme - 100% Offline Gaming - Ad-Free Experience - Game Center Integration - Multiple Difficulty Levels - Smart Hint System - Unlimited Undo ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/duono-binary-logic-puzzle/id6745228046/reviews.md ### 1/5 — Jeu *2026-07-18* J’ai téléchargé le jeu sur l’App Store, il m’a été indiqué que l’application était compatible avec VoiceOver j’y crois pas vraiment parce que il n’y a aucune aucune précision sur les symboles du jeu c’est écrit égal fois mais quand on appuie sur les symboles ça nous donne rien du tout donc que je vais mettre qu’une étoile au jeu, donc j’aimerais bien que j’aimerais bien qu’on change comment dire, j’aimerais bien qu’on change cette application afin qu’elle soit entièrement compatible avec VoiceOver. Merci. Nathalie ### 4/5 — Easy fix *2025-11-05* Can you please make the = and x signs a little bigger? I wear glasses and still can’t tell which is which. Otherwise everything is perfect! **Developer response:** Thank you very much for your feedback! 🌸 We have taken note of your comment regarding the confusion between the = and × symbols. We will resolve this issue in our next update; the symbols will now be more clearly visible. Thank you for your support and understanding 💛 ### 5/5 — Best binary puzzle game on the App Store *2025-06-18, version 1.1* If you’re into binary logic puzzles, Duono is a must-play. The sun and moon concept is a fresh take, and I love the infinite grid system! ### 5/5 — Başarılı *2025-06-18, version 1.1* Herhangi bir yerde beklerken biraz mantık kullanarak vakit geçirmenizi sağlayan güzel bir oyun. Tavsiye edilir 👍🏻 ### 5/5 — Simple Addictive Concept *2025-06-18, version 1.1* One of the most engaging puzzle games I’ve played in a while. The rules are easy to understand. Highly recommended ### 5/5 — Best Logic Puzzle Game I’ve Played! *2025-06-18, version 1.1* I’ve been hooked on Duono for days! If you enjoy brain training games or logic puzzles like Sudoku or Binary Grid, this one is a must-try. The design is clean, the puzzles are challenging but fair, and it’s perfect for improving focus and logical thinking. I especially love the minimalist visuals and offline play support. Highly recommend it to anyone who enjoys number puzzles or daily brain teasers! ## Frequently asked questions about Duono ### What is Duono? Duono is a paid logic puzzle game that features a unique sun and moon theme with tricky binary logic patterns. It offers a pure logic-solving experience with no guessing required and is designed for brain training and strategic thinking. ### Does Duono have ads? No, Duono offers an ad-free experience, allowing for pure puzzle focus without any interruptions. This is a key feature highlighted for players seeking an uninterrupted gaming session. ### Can I play Duono offline? Yes, Duono is 100% offline gaming, making it perfect for playing anywhere, anytime without needing an internet connection. This feature is ideal for commutes or travel. ### What are the difficulty levels in Duono? Duono offers multiple difficulty levels including Easy, Medium, Hard, Clever, and Random modes. These levels adjust the number of starting hints provided, catering to a wide range of player skills. ### Does Duono support multiple languages? Yes, Duono supports 11 languages, including English, Turkish, French, German, Italian, Portuguese, Spanish, Japanese, Thai, Indonesian, and Malay. This broad language support makes it accessible to a global audience. ### How does Duono compare to other binary logic puzzles? Duono stands out with its unique sun and moon theme, ad-free experience, and full Game Center integration for global competition. It also offers a perfect 6x6 grid size and a smart hint system for a balanced challenge. ### What are the core game mechanics of Duono? The core mechanics involve placing sun and moon symbols according to simple rules: 3 of each per row/column and no more than 2 identical symbols touching. Constraint symbols guide the solving process through logical deduction. ### Is Duono suitable for all ages? Duono has an age rating of 4+, indicating it is suitable for a wide audience. The game's logic-based nature and lack of inappropriate content make it a safe choice for younger players and adults alike. ## Version history (last 5 releases) ### 1.6.1 — 2026-08-14 Duono is being updated and revamped for you! This update lets you play the binary puzzle with different shape combinations. Thank you for playing! ### 1.6 — 2026-02-02 Duono is being updated and renewed for you! This update includes bug fixes and performance improvements. Thank you for playing! ### 1.5.1 — 2025-11-13 Duono is being updated and renewed for you! bug fixes and performance improvements. Thank you for playing! ### 1.5 — 2025-11-13 Duono is being updated and renewed for you! This update includes the XP/level feature, adjustable symbol size, and performance improvements. Thank you for playing! ### 1.4.1 — 2025-07-28 Duono is being updated and refreshed for you! Ready for new challenges? This update includes bug fixes and performance improvements for game center and weekly event. Thanks for playing! ## Apps similar to Duono | App | Rating | Price | Category | | --- | --- | --- | --- | | [Puzzle 15 – The Mind Game](https://appshunter.io/ios/app/puzzle-15-the-mind-game/id6745624877) | 5.0 (1) | Free | Games | | [Merge It! – Logic & Strategy](https://appshunter.io/ios/app/merge-it-logic-and-strategy/id6745765018) | — | Free | Games | | [Pulsefield](https://appshunter.io/ios/app/pulsefield/id6761028234) | 5.0 (1) | Free | Games | | [Crowns Keeper](https://appshunter.io/ios/app/crowns-keeper/id6757496273) | 5.0 (1) | Free | Games | | [Othello Puzzle](https://appshunter.io/ios/app/othello-puzzle/id6746629043) | 5.0 (1) | Free | Games | | [The Platform - Survive](https://appshunter.io/ios/app/the-platform-survive/id6744445187) | 5.0 (1) | $1.99 | Games | ## More apps by Fatma Nur Usluer - [Mini Sudoku: 6x6 Challenge](https://appshunter.io/ios/app/mini-sudoku-6x6-challenge/id6751756894) - [Turkcle: Türkçe Kelime Oyunu](https://appshunter.io/ios/app/turkcle-turkce-kelime-oyunu/id6755895077) - [Tap Paradox: Tricky Mind Game](https://appshunter.io/ios/app/tap-paradox-tricky-mind-game/id6767845633) All apps by Fatma Nur Usluer: https://appshunter.io/developer/1811406191 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*