# Bubble Sort Merge vs CatBlock

Bubble Sort Merge and CatBlock are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Bubble Sort Merge ships an update every 10 days, CatBlock every 3 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Bubble Sort Merge | CatBlock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/catblock-block-out-puzzle/id6787829216/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | — | Ad-supported |
| Size | 396 MB | 200 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [META KINGDOM LIMITED](https://appshunter.io/developer/1629613295) | [Chengdu Infinite Seek Technology Co., Ltd](https://appshunter.io/developer/1835571102) |

## What reviewers say

### Bubble Sort Merge

[App page](https://appshunter.io/ios/app/bubble-sort-merge/id6777954843)

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

**In-app purchases:** none


### CatBlock

[App page](https://appshunter.io/ios/app/catblock-block-out-puzzle/id6787829216)

Engage your mind with a relaxing logic puzzle game featuring shape-filling mechanics and adorable cats. Solve thousands of handcrafted levels using observation and deduction, with no timers or pressure.

**Highlights:** Shape-filling logic puzzles, Thousands of handcrafted levels, Adorable cat theme, Offline play supported, No timers or pressure, Hint system available

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

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Sort Merge free?

Bubble Sort Merge is free to download, with no in-app purchases.

### Is CatBlock free?

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

### Do Bubble Sort Merge or CatBlock have ads?

Both Bubble Sort Merge and CatBlock show ads.

### Which is updated more often, Bubble Sort Merge or CatBlock?

Bubble Sort Merge ships an update every 10 days, and CatBlock every 3 weeks. Most recently, Bubble Sort Merge was updated on October 31, 2026 and CatBlock on October 31, 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.*