# Stack Surge vs Wool Jam

The clearest difference is ads: Stack Surge at none against Wool Jam's shown. Wool Jam's advantage is update cadence (fortnightly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Stack Surge ships an update every 2 months, Wool Jam fortnightly. The most recent releases landed on September 12, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Stack Surge | Wool Jam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (79 ratings)](https://appshunter.io/ios/app/wool-jam-yarn-loop-puzzle/id6787925312/reviews)** |
| Number of ratings | — | **79** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Ad-supported |
| Size | 43 MB | 280 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ahmet Emre CAKMAK](https://appshunter.io/developer/1877092106) | [UNICO STUDIO](https://appshunter.io/developer/1467451326) |

## What reviewers say

### Stack Surge

[App page](https://appshunter.io/ios/app/stack-surge-block-tower/id6761648364)

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

**In-app purchases:** none


### Wool Jam

[App page](https://appshunter.io/ios/app/wool-jam-yarn-loop-puzzle/id6787925312)

Unravel colorful yarn balls, manage a spinning loop, and knit beautiful patchwork patterns. Solve relaxing logic puzzles by matching yarn colors to create adorable designs. Avoid getting stuck and use powerful boosters to overcome challenging levels.

**Highlights:** Unravel and match colorful yarn, Manage spinning yarn loop, Knit patchwork patterns, Solve logic puzzles, Overcome unique obstacles, Use powerful boosters

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

**In-app purchases:** none


## Frequently asked questions

### Is Stack Surge free?

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

### Is Wool Jam free?

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

### Do Stack Surge or Wool Jam have ads?

Wool Jam shows ads; Stack Surge does not.

### Which is updated more often, Stack Surge or Wool Jam?

Stack Surge ships an update every 2 months, and Wool Jam fortnightly. Most recently, Stack Surge was updated on September 12, 2026 and Wool Jam on September 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.*