# Cat Sudoku vs Stack Merge Mobile

The clearest difference is review sentiment: Stack Merge Mobile at 100% against Cat Sudoku's 50%. Stack Merge Mobile also leads on ads (none vs shown) and rating (5.0 vs 4.7). Cat Sudoku's advantage is ratings volume (79 vs 9). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Stack Merge Mobile holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Cat Sudoku has 79 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 50% of Cat Sudoku's written reviews are positive against 100% of Stack Merge Mobile's.

Cat Sudoku ships an update every 10 days, Stack Merge Mobile fortnightly. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Cat Sudoku | Stack Merge Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (79 ratings)](https://appshunter.io/ios/app/cat-sudoku-logic-puzzle/id6758651124/reviews) | **[5.0 (9 ratings)](https://appshunter.io/ios/app/stack-merge-mobile/id6760034466/reviews)** |
| Number of ratings | **79** | 9 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Ad-supported | **Free** |
| Size | 217 MB | 76 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Chengdu Infinite Seek Technology Co., Ltd](https://appshunter.io/developer/1835571102) | [Alec Richard Pickup](https://appshunter.io/developer/1882410794) |

## What reviewers say

### Cat Sudoku

[App page](https://appshunter.io/ios/app/cat-sudoku-logic-puzzle/id6758651124)

Engage in a relaxing brain game that combines logic puzzles with a charming cat theme. Use pure deduction to place cats correctly in grid-based challenges, offering a calming yet stimulating experience.

**Highlights:** Sudoku-inspired logic gameplay, Relaxing cat-themed design, Pure logic puzzles, Hundreds of handcrafted levels, Offline play supported, No timers or pressure

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Stack Merge Mobile

[App page](https://appshunter.io/ios/app/stack-merge-mobile/id6760034466)

A satisfying puzzle game where players efficiently pack blocks to create higher numbers and earn gold. Compete for high scores on the leaderboard and enjoy a relaxing experience that can be paused and resumed anytime.

**Highlights:** Block stacking puzzle gameplay, High score competition, Leaderboard rankings, In-game item usage, Pause and resume functionality, Relaxing time-passing activity

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Cat Sudoku free?

Cat Sudoku is free to download, with no in-app purchases.

### Is Stack Merge Mobile free?

Stack Merge Mobile is free to download, with no in-app purchases.

### Which has better reviews, Cat Sudoku or Stack Merge Mobile?

Stack Merge Mobile is rated higher. Cat Sudoku averages 4.7 out of 5 from 79 ratings, while Stack Merge Mobile averages 5.0 from 9 ratings.

### Do Cat Sudoku or Stack Merge Mobile have ads?

Cat Sudoku shows ads; Stack Merge Mobile does not.

### Which is updated more often, Cat Sudoku or Stack Merge Mobile?

Cat Sudoku ships an update every 10 days, and Stack Merge Mobile fortnightly. Most recently, Cat Sudoku was updated on October 24, 2026 and Stack Merge Mobile on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*