Comparison

Duono vs Zekai

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Unique Sun & Moon Theme
  • 100% Offline Gaming
  • Ad-Free Experience
  • Game Center Integration
  • Multiple Difficulty Levels
  • Smart Hint System
  • Unlimited Undo
Features
Read full description

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.

About

Zekai

This app offers five premium logic puzzles, including Sudoku, Word Hunt, Queens, Tango, and Zip, with over 20,000 hand-crafted levels. Enjoy daily challenges, offline play, and a minimalist design without forced subscriptions or intrusive ads.

Highlights
  • 5 curated logic games in one app
  • 20,000+ hand-crafted levels
  • Daily goal and streaks
  • XP progression and achievements
  • Offline play
  • Minimalist design with dark mode
  • No subscription required
Features
Read full description

Sudoku, Word Hunt, Queens, Tango, Zip — 5 premium logic puzzles in one app. Brain training, daily challenges, 20,000+ hand-crafted levels. Offline. No forced subscription. Featured by Apple in "New Apps We Love." PUZZLES INCLUDED • Sudoku — the classic number puzzle, 5,000 levels across 5 difficulties • Word Hunt — find hidden words in a grid, with English word lists built in • Queens — place queens so none threaten each other (one per row, column, and colored region) • Tango — balance suns and moons with simple rules (a Binairo / Takuzu logic grid) • Zip — connect the numbers in sequence without crossing paths WHY ZEKAI • 5 curated logic games in one app — no clutter, no filler • 20,000+ hand-crafted levels across the collection • Daily goal + streaks to keep your habit alive • XP progression and achievements • Plays offline — on a plane, on the subway, anywhere • Minimalist design with full dark-mode support — no flashing ads mid-puzzle • No subscription required to enjoy the core experience Zekai is for anyone who wants the best of classic logic puzzles without the noise. Train your focus, sharpen your pattern recognition, and make puzzling a daily habit. Download Zekai and start your daily streak today. Featured by Apple in "New Apps We Love." — Privacy Policy: https://sixsensely.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Duono4 screens
Zekai4 screens

Verdict

The call

The clearest difference is price: Zekai at Free against Duono's $2.99. Zekai also leads on review sentiment (100% vs 83%) and iOS requirement (15.1 vs 17.0). Duono's advantage is rating (4.0 vs 3.0) and in-app purchases (none vs 3). On ratings volume, update cadence and device support 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

CostPrice · In-app purchases · Ads · Monetization

Zekai is free to download; Duono costs $2.99 up front. Zekai sells 3 in-app purchases, starting at $4.99 per month. Duono asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Duono holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews complicate that: 83% of Duono's written reviews are positive against 100% of Zekai's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Duono ships an update every 2 weeks, Zekai every 9 days. The most recent releases landed on October 11, 2026 and September 26, 2026 respectively.

Scorecard7 real differences · 3 level
Duono versus Zekai: the parameters behind the verdict, then further details
ParameterDuonoZekai
Price$2.99Free — better
Rating4.0 (1 ratings) — better3.0 (2 ratings)
Positive reviews83.3% of reviews100.0% of reviews — better
Number of ratings12 — better
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size23 MB133 MB
Age rating4+4+
DeveloperFatma Nur UsluerSelcuk Guler

Customer experience

Duono

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Zekai

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Duono

No in-app purchases

3 purchases

Zekai

Subscriptions2
  • Monthly$4.991 Month
  • Yearly7 Days trial$29.991 Year
One-time1
  • Lifetime$59.99

Questions

Is Duono free?
Duono costs $2.99, with no in-app purchases.
Is Zekai free?
Zekai is free to download, with in-app purchases available.
Which has better reviews, Duono or Zekai?
Duono is rated higher. Duono averages 4.0 out of 5 from 1 ratings, while Zekai averages 3.0 from 2 ratings.
Do Duono or Zekai have ads?
Zekai shows ads; Duono does not.
Which is updated more often, Duono or Zekai?
Duono ships an update every 2 weeks, and Zekai every 9 days. Most recently, Duono was updated on October 11, 2026 and Zekai on September 26, 2026.

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