# Bubble Sort Merge vs Wool Roll

The clearest difference is update cadence: Wool Roll at every 2 days against Bubble Sort Merge's every 10 days. Wool Roll also leads on iOS requirement (13.0 vs 15.0). On price, ads, 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.

Bubble Sort Merge ships an update every 10 days, Wool Roll every 2 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Bubble Sort Merge | Wool Roll |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | **Every 2 days** |
| Size | 396 MB | 150 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [META KINGDOM LIMITED](https://appshunter.io/developer/1629613295) | [Pham Vu Hoang](https://appshunter.io/developer/1592935559) |

## 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


### Wool Roll

[App page](https://appshunter.io/ios/app/wool-roll-thread-puzzle/id6780773610)

**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 Wool Roll free?

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

### Do Bubble Sort Merge or Wool Roll have ads?

Both Bubble Sort Merge and Wool Roll show ads.

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

Bubble Sort Merge ships an update every 10 days, and Wool Roll every 2 days. Most recently, Bubble Sort Merge was updated on October 28, 2026 and Wool Roll on October 25, 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.*