Comparison

Decodex vs Clear Sudoku 9

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

Head to head
About

Decodex

Engage in a modern take on classic cryptogram puzzles. Decipher quotes and enigma codes across diverse categories. Track your progress, build streaks, and enjoy a new challenge daily.

Highlights
  • 50+ puzzle categories
  • Daily enigma challenges
  • Intuitive user interface
  • Progress tracking and streaks
  • Substitution cipher gameplay
Features
Read full description

Step into a world of logic and ciphers. Decodex transforms classic cryptogram puzzles into a modern, addictive mobile experience. Whether you’re a fan of wordy challenges, a wordsearch enthusiast, or an enigma-solving veteran, our puzzles will sharpen your mind one quote at a time. If you enjoy the daily ritual of the NYTimes Games or the deep strategy of a crypto game, Decodex is your new favorite obsession. Key Features: - 50+ Categories: From Ancient Philosophy to Modern Wit. - Daily Enigmas: A fresh substitution cipher every single day. - Intuitive UI: Designed for effortless logic-first play. - Track Your Progress: Earn stars, build streaks, and become a master codebreaker.

About

Clear Sudoku 9

This Sudoku app prioritizes clarity with large, bold numbers and a clean interface. Enjoy a comfortable puzzle experience with intuitive controls, adjustable difficulty, and daily challenges. Play offline without ads or accounts.

Highlights
  • Large, bold numbers
  • Clean, uncluttered board
  • Simple, intuitive controls
  • Adjustable difficulty levels
  • Daily challenges
  • Progress tracking
  • Offline play
Features
Read full description

Finally, a Sudoku app that's easy to see and easy to play. Clear Sudoku 9 is designed with clarity in mind. Large, bold numbers. A clean, uncluttered board. Simple, intuitive controls. No squinting, no confusion — just the classic number puzzle you know and love, made comfortable for everyone. LARGE, CLEAR NUMBERS Every digit on the board is big, bold, and easy to read. No tiny text, no cramped grids. The entire interface is designed so you can see everything at a glance — even without your reading glasses. SIMPLE TO USE • Tap a cell, tap a number — that's it • Big, easy-to-press number buttons • Undo any move with one tap • Gentle error highlighting helps you catch mistakes • Helpful hints when you need a nudge in the right direction START AT YOUR OWN PACE Begin with Easy puzzles — they're relaxing and satisfying, perfect for unwinding. When you're ready, try Medium, Hard, or Expert. There's no rush and no pressure. You can even hide the timer! DAILY CHALLENGES A fresh puzzle every day, matched to your skill level. A wonderful part of your daily routine — enjoy your morning coffee with your morning puzzle. KEEP TRACK OF YOUR PROGRESS • See how many puzzles you've completed • Watch your winning streak grow • Earn stars based on how well you do • Celebrate personal best times • Earn achievement badges for milestones COMFORTABLE DESIGN • Clean, spacious layout — nothing cluttered or distracting • Choose light mode for daytime or dark mode for evenings • Works beautifully on iPhone, iPad and iPhone Duo • iPad shows an extra-large board — perfect for comfortable play • On iPhone Duo, play on the outer screen or unfold for a bigger board with the number pad right beside it NO ADS. NO ACCOUNTS. NO INTERNET NEEDED. Clear Sudoku 9 is just $1.99, with no advertising, no sign-ups, and no internet connection required. It works everywhere — at home, on the go, or on a plane. YOUR PRIVACY IS PROTECTED We collect absolutely no data. No tracking, no analytics, nothing. Your puzzles and progress stay on your device and nowhere else. AVAILABLE IN YOUR LANGUAGE Enjoy the app in English, German, Greek, Spanish, French, or Italian. Download Clear Sudoku 9 today and rediscover the joy of Sudoku — clear, comfortable, and designed for you.

Screenshots

Decodex4 screens
Clear Sudoku 94 screens

Verdict

The call

The clearest difference is price: Decodex at Free against Clear Sudoku 9's $1.99. Decodex also leads on review sentiment (100% vs 67%) and update cadence (every 2 days vs every 9 days). Clear Sudoku 9's advantage is in-app purchases (none vs 4). On rating, ratings volume, ads 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

Decodex is free to download; Clear Sudoku 9 costs $1.99 up front. Decodex sells 4 one-off in-app purchases. Clear Sudoku 9 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Decodex against 5.0 for Clear Sudoku 9. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews are what separate them: 100% of Decodex's written reviews are positive against 67% of Clear Sudoku 9's.

UpkeepUpdate frequency

Decodex ships an update every 2 days, Clear Sudoku 9 every 9 days. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
Decodex versus Clear Sudoku 9: the parameters behind the verdict, then further details
ParameterDecodexClear Sudoku 9
PriceFree — better$1.99
Rating5.0 (3 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings3 — better2
Update frequencyEvery 2 days — betterEvery 9 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size19 MB2 MB
Age rating4+4+
DeveloperAron CsatlosTheano Bertsia

Customer experience

Decodex

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Clear Sudoku 9

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

4 purchases

Decodex

One-time4
  • Extra Hints - Small Pack$0.99
  • Extra Hints - Big Pack$1.99
  • Decodex Premium$2.99
Show 1 more
  • Extra Hints - Ultimate Pack$4.99
None

Clear Sudoku 9

No in-app purchases

Questions

Is Decodex free?
Decodex is free to download, with in-app purchases available.
Is Clear Sudoku 9 free?
Clear Sudoku 9 costs $1.99, with no in-app purchases.
Which has better reviews, Decodex or Clear Sudoku 9?
Decodex and Clear Sudoku 9 are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.
Do Decodex or Clear Sudoku 9 have ads?
Neither Decodex nor Clear Sudoku 9 shows ads.
Which is updated more often, Decodex or Clear Sudoku 9?
Decodex ships an update every 2 days, and Clear Sudoku 9 every 9 days. Most recently, Decodex was updated on October 24, 2026 and Clear Sudoku 9 on October 24, 2026.

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