# QA² vs ギャラバックレヤン

The clearest difference is in-app purchases: QA² at none against ギャラバックレヤン's 2. QA² also leads on ads (none vs shown). ギャラバックレヤン's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. ギャラバックレヤン sells 2 in-app purchases, starting at $1.99 per month. QA² asks for nothing beyond the download.

QA² ships an update every 3 weeks, ギャラバックレヤン every 4 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | QA² | ギャラバックレヤン |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free | — |
| Size | 180 MB | 194 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [TISI Incorporated](https://appshunter.io/developer/463993929) | [Gauntlet co.,ltd.](https://appshunter.io/developer/395715317) |

## What reviewers say

### QA²

[App page](https://appshunter.io/ios/app/qa/id6747648497)

Engage in a unique puzzle game set in the quantum world. Swipe and match colorful blocks to create satisfying chain reactions and master various game modes. Challenge AI opponents and compete on global leaderboards.

**Highlights:** Quantum-themed puzzle gameplay, Satisfying chain reaction system, Multiple game modes (Rush, Depth, Flow, Overload), VS AI mode with challenging opponents, Global leaderboards for competitive play, Brain training mechanics

**In-app purchases:** none


### ギャラバックレヤン

[App page](https://appshunter.io/ios/app/id6752123604)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Supporter | $1.99 | per month |
| みまもりロデム | $0.49 | one-time |


## Frequently asked questions

### Is QA² free?

QA² is free to download, with no in-app purchases.

### Is ギャラバックレヤン free?

ギャラバックレヤン is free to download, with in-app purchases available.

### Do QA² or ギャラバックレヤン have ads?

ギャラバックレヤン shows ads; QA² does not.

### Which is updated more often, QA² or ギャラバックレヤン?

QA² ships an update every 3 weeks, and ギャラバックレヤン every 4 weeks. Most recently, QA² was updated on October 24, 2026 and ギャラバックレヤン on October 24, 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.*