# QA² vs プラネットマージ：ダイヤドロップス

The clearest difference is ads: QA² at none against プラネットマージ：ダイヤドロップス's shown. プラネットマージ：ダイヤドロップス's advantage is update cadence (every 3 days vs every 3 weeks). 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.

QA² ships an update every 3 weeks, プラネットマージ：ダイヤドロップス every 3 days. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | QA² | プラネットマージ：ダイヤドロップス |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 180 MB | 292 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [TISI Incorporated](https://appshunter.io/developer/463993929) | [fujita ryo](https://appshunter.io/developer/1722037364) |

## 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


### プラネットマージ：ダイヤドロップス

[App page](https://appshunter.io/ios/app/360/id6756601446)

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

**In-app purchases:** none


## Frequently asked questions

### Is QA² free?

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

### Is プラネットマージ：ダイヤドロップス free?

プラネットマージ：ダイヤドロップス is free to download, with no in-app purchases.

### Do QA² or プラネットマージ：ダイヤドロップス have ads?

プラネットマージ：ダイヤドロップス shows ads; QA² does not.

### Which is updated more often, QA² or プラネットマージ：ダイヤドロップス?

QA² ships an update every 3 weeks, and プラネットマージ：ダイヤドロップス every 3 days. Most recently, QA² was updated on September 25, 2026 and プラネットマージ：ダイヤドロップス on September 10, 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.*