Sudoku vs Stack Em! Cosmic Blocks
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sudoku
Engage your logic and memory with this classic number-placement puzzle game. It offers multiple difficulty levels, helpful tools like hints and undo, and daily challenges to sharpen your skills. Enjoy a relaxing yet mentally stimulating experience on your phone or tablet.
- Daily and My Challenges
- 4 difficulty levels
- Highlighting of selected numbers and related cells
- Hint and Intelligent Hint functions
- Error Cap and Automatic Error-Checking
- Unlimited Undo/Redo
- Autosave incomplete games
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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
Stack Em! Cosmic Blocks
A relaxing block puzzle game designed for short play sessions. Drag and drop pieces to complete rows and columns, clear space, and aim for high scores. Enjoy satisfying visual and audio feedback with multiple themes.
- Ad-free gameplay
- Fast offline play
- No account required
- Smooth drag-and-drop controls
- Satisfying clears and combos
- Multiple unlockable themes
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Stack Em! is a clean, satisfying block puzzle built for quick sessions. Drag pieces onto the board, complete rows and columns, clear space, and chase a higher score. Features: • Ad Free! Just Play • Fast offline gameplay • No account required • Smooth drag-and-drop block placement • Satisfying clears, combos, sound, and haptics • Multiple visual themes to unlock and enjoy Play at your own pace, restart instantly, and keep improving your best run.
Screenshots
Verdict
The clearest difference is in-app purchases: Stack Em! Cosmic Blocks at none against Sudoku's 3. Stack Em! Cosmic Blocks also leads on ads (none vs shown) and rating (5.0 vs 4.5). Sudoku's advantage is ratings volume (660 vs 2) and device support (3 vs 1). On price 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
Both are free to download. Sudoku sells 3 in-app purchases, starting at $0.99 per month. Stack Em! Cosmic Blocks asks for nothing beyond the download.
Stack Em! Cosmic Blocks holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sudoku has 660 ratings behind it against 2, so its average is the more settled of the two.
Sudoku ships an update every 5 weeks, Stack Em! Cosmic Blocks every 3 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | Sudoku | Stack Em! Cosmic Blocks |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (660 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 50.3% of reviews | — |
| Number of ratings | 660 — better | 2 |
| Update frequency | Every 5 weeks | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 136 MB | 31 MB |
| Age rating | 12+ | 4+ |
| Developer | Aged Studio Limited | JMM Technologies |
Customer experience
Sudoku
Stack Em! Cosmic Blocks
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
Stack Em! Cosmic Blocks
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sudoku
- Remove Ads - 1 Month$0.991 Month
- Remove Ads - 3 Months$2.493 Months
- Remove All Ads - 1 Year$8.491 Year
Stack Em! Cosmic Blocks
No in-app purchases
Questions
Is Sudoku free?
Is Stack Em! Cosmic Blocks free?
Which has better reviews, Sudoku or Stack Em! Cosmic Blocks?
Do Sudoku or Stack Em! Cosmic Blocks have ads?
Which is updated more often, Sudoku or Stack Em! Cosmic Blocks?
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