# 計算の達人 vs QA²

The clearest difference is review sentiment: QA² at 50% against 計算の達人's 33%. 計算の達人's advantage is iOS requirement (8.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

計算の達人 ships an update every 11 days, QA² every 3 weeks. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 計算の達人 | QA² |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 15 MB | 180 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [kitamura hira](https://appshunter.io/developer/324426988) | [TISI Incorporated](https://appshunter.io/developer/463993929) |

## What reviewers say

### 計算の達人

[App page](https://appshunter.io/ios/app/id791048038)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 計算の達人 free?

計算の達人 is free to download, with no in-app purchases.

### Is QA² free?

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

### Do 計算の達人 or QA² have ads?

Neither 計算の達人 nor QA² shows ads.

### Which is updated more often, 計算の達人 or QA²?

計算の達人 ships an update every 11 days, and QA² every 3 weeks. Most recently, 計算の達人 was updated on October 2, 2026 and QA² on October 12, 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.*