Duono vs Crowns Keeper
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Duono
Engage in a unique binary logic puzzle adventure with a beautiful sun and moon theme. Solve tricky tango-style patterns using pure logic, with no guessing required. Enjoy offline play, global competition, and a distraction-free experience.
- Unique Sun & Moon Theme
- 100% Offline Gaming
- Ad-Free Experience
- Game Center Integration
- Multiple Difficulty Levels
- Smart Hint System
- Unlimited Undo
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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.
Crowns Keeper
This app simplifies scoring for card games like Five Crowns, automatically tracking rounds and totals. It remembers wild cards and displays final standings, making game nights easier. It also functions as a flexible scorekeeper for various other card games.
- Automatic round tracking
- Running score totals
- Wild card memory
- Final standings display
- Supports various card games
- Lock Screen and Dynamic Island integration
- Siri and Shortcuts support
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Keep score for Five Crowns. Built for family game nights, road trips, and lazy afternoons on the porch. CrownsKeeper tracks every round automatically, shows running totals at a glance, and remembers which card is wild so you don't have to. When the game ends, see the final standings and crown your winner. BUILT FOR CROWNS - 11 rounds with a different wild card every round - Automatic round tracking and final standings - Lowest total score wins, the app crowns the winner - "Went Down" toggle for the player who finishes a round ONE PURCHASE, EVERYWHERE CrownsKeeper is free to download and play your first game. Unlock unlimited games forever with a single one-time purchase. Family Sharing included. LIVE ACTIVITIES Pin the current round and scores to your Lock Screen and Dynamic Island. Glance down between hands without unlocking your phone. WIDGETS Home Screen and Lock Screen widgets show the current game at a glance. SIRI AND SHORTCUTS Ask Siri who's winning, get the current wild card, or start a new game by voice. App Intents work with Shortcuts, automations, and the Action Button. iCLOUD SYNC Game history syncs across all your devices through iCloud. Start a game on iPhone, finish it on iPad. CHOOSE YOUR LOOK Eight themes — Classic wood, Clean, Original, Georgia, Modern, Leather, Haze, and Popsicle — with Light and Dark. A dyslexia-friendly font option (OpenDyslexic) too. Full VoiceOver support, Dynamic Type, and high-contrast scores. FULLY LOCALIZED Fully localized in 18 languages.
Screenshots
Verdict
The clearest difference is price: Crowns Keeper at Free against Duono's $2.99. Crowns Keeper also leads on rating (5.0 vs 4.0). Duono's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 3 months). On ratings volume, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Crowns Keeper is free to download; Duono costs $2.99 up front. Crowns Keeper sells 1 one-off in-app purchase. Duono asks for nothing beyond the download.
Crowns Keeper holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Duono ships an update every 2 weeks, Crowns Keeper every 3 months. The most recent releases landed on September 10, 2026 and August 29, 2026 respectively.
| Parameter | Duono | Crowns Keeper |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 23 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Fatma Nur Usluer | ioloro |
Customer experience
Duono
Crowns Keeper
In-app purchases
Duono
No in-app purchases
Crowns Keeper
- Unlimited Crowns$0.99





