Comparison

Sudoku vs Silent Library

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

Head to head
About

Sudoku

This logic puzzle game challenges you to fill a 9x9 grid with numbers 1-9, ensuring no repeats in rows, columns, or sub-grids. It offers multiple difficulty levels, helpful tools like hints and undo, and daily challenges to sharpen your brain and memory.

Highlights
  • 4 difficulty levels
  • Daily and My Challenges
  • Hint and Undo/Redo functions
  • Highlighting for selected numbers
  • Automatic error-checking
  • Multiple background styles
Features
Read full description

Classic sudoku game now can be played on your phone and tablet. Sudoku is a logic number-placement puzzle game. To win a sudoku game, you need to fill the 9×9 grid with numbers so that there will be no repetitive number in each row, each column and each 3×3 sub-grid, namely numbers 1-9 will only appear once in each row, column or sub-grid. Also, it is a relaxing causal game, but it requires your focus to figure out the solution. Therefore, sudoku will help you exercise your brain and memory because you need to think and utilize your logic when you are playing sudoku. Our sudoku is committed to improve your game experience. It has 4 levels of difficulty for players with different capabilities of sudoku, from beginners to masters on sudoku. Also, it has various functions to help you win the game, such as Hint, Undo/Redo, Take Notes, etc. Moreover, you can practice your skills and challenge yourself by playing Daily Challenge and My Challenge. We are sure you can have great fun and better game experience when you are playing our sudoku. Now, download Aged Sudoku and start figuring out solutions to every puzzle! Features: - Daily Challenge & My Challenge: you can challenge every day to practice your skills of playing sudoku - 4 levels of difficulty - Highlighting: selected number, row, column, sub-grid and other same numbers will be highlighted when one of the cells is selected - Hint: when there is a single solution in the game, you can click Hint and then it will automatically fill the cell with answer - Intelligent hint: when you select the last empty cell in a row, column or sub-grid, you will be reminded of the answer - Error Cap: turn on/off mistake limit - The quantity of remaining numbers is provided - Hide numbers which have used up - Unlimited chances of Undo/Redo - Automatic Error-Checking: when you fill with a wrong answer, it will automatically undo your answer - Autosave incomplete game - Multiple background and appearance styles you can choose - Multiple language choices [Auto Renewable Ads Removal Subscription] ▸ Subscription Service: Remove the ads + Unlimited Hints ▸ Subscription Payment: Once you confirm the payment, you can find the record in your iTunes Account ▸ Subscription Cancelation: Go to “Setting” -> “iTunes Store and App Store” -> “Apple Id”-> ”View Apple Id”-> “Account Setting” -> “Subscription” You have to cancel the subscription 24 hours before the end of previous subscription ▸ Term of Use: https://sudoku.club/terms-of-use ▸ Privacy Policy: https://sudoku.club/privacy-policy

About

Silent Library

Features
Read full description

Silent Library is an artistic puzzle game where your breath leaves watercolor traces. Breathe softly to draw thin strokes. Stay quiet and let pigment bloom. Use your voice to dash and fill—mind the edges. FEATURES • 15 handcrafted pages across 3 books • Breath- and voice-guided painting • Full touch assist if you prefer not to use the microphone • Gallery to keep every finished watercolor • Offline-first, no account, no ads Calibrate your room, open the quiet book, and awaken murals of gardens, tides, and stars.

Screenshots

Sudoku4 screens
Silent Library3 screens

Verdict

The call

The clearest difference is in-app purchases: Silent Library at none against Sudoku's 3. Silent Library also leads on ads (none vs shown). Sudoku's advantage is iOS requirement (13.0 vs 15.0). On price, 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

Both are free to download. Sudoku sells 3 in-app purchases, starting at $0.99 per month. Silent Library asks for nothing beyond the download.

UpkeepUpdate frequency

Sudoku ships an update every 5 weeks, Silent Library every 6 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Sudoku versus Silent Library: the parameters behind the verdict, then further details
ParameterSudokuSilent Library
PriceFreeFree
Rating4.5 (660 ratings) — better—
Positive reviews50.3% of reviews—
Number of ratings660 — better—
Update frequencyEvery 5 weeks — betterEvery 6 weeks
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size136 MB43 MB
Age rating12+4+
DeveloperAged Studio LimitedCountry Hills Animal Clinic Inc

Bugs and requests

Sudoku

Reported bugs

3 issues
  • Ads cause app to freeze or crash
  • Subscription issues with ad removal
  • Incorrect difficulty level labeling

Requested features

4 requests
  • Landscape mode support
  • Auto-fill candidate numbers
  • More advanced difficulty levels
  • Customizable UI and themes

Silent Library

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Sudoku

Subscriptions3
  • Remove Ads - 1 Month$0.991 Month
  • Remove Ads - 3 Months$2.493 Months
  • Remove All Ads - 1 Year$8.491 Year
None

Silent Library

No in-app purchases

Questions

Is Sudoku free?
Sudoku is free to download, with in-app purchases available.
Is Silent Library free?
Silent Library is free to download, with no in-app purchases.
Do Sudoku or Silent Library have ads?
Sudoku shows ads; Silent Library does not.
Which is updated more often, Sudoku or Silent Library?
Sudoku ships an update every 5 weeks, and Silent Library every 6 weeks. Most recently, Sudoku was updated on November 7, 2026 and Silent Library on October 31, 2026.

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