# Happy Stacking Fun vs Line Thread

Happy Stacking Fun and Line Thread 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.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Happy Stacking Fun | Line Thread |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Size | 177 MB | 144 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [LanGang Zhang](https://appshunter.io/developer/1740225725) | [跃 于](https://appshunter.io/developer/1853767161) |

## What reviewers say

### Happy Stacking Fun

[App page](https://appshunter.io/ios/app/happy-stacking-fun/id6483686011)

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

**In-app purchases:** none


### Line Thread

[App page](https://appshunter.io/ios/app/line-thread/id6784157488)

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

**In-app purchases:** none


## Frequently asked questions

### Is Happy Stacking Fun free?

Happy Stacking Fun is free to download, with no in-app purchases.

### Is Line Thread free?

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

### Do Happy Stacking Fun or Line Thread have ads?

Both Happy Stacking Fun and Line Thread show ads.

### Which is updated more often, Happy Stacking Fun or Line Thread?

Happy Stacking Fun ships an update fortnightly, and Line Thread fortnightly. Most recently, Happy Stacking Fun was updated on September 30, 2026 and Line Thread on October 9, 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.*