# QA² vs Work Work SUN

The clearest difference is in-app purchases: QA² at none against Work Work SUN's 1. QA² also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Work Work SUN sells 1 one-off in-app purchase. QA² asks for nothing beyond the download.

QA² ships an update every 3 weeks, Work Work SUN every 2 months. The most recent releases landed on September 25, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | QA² | Work Work SUN |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 180 MB | 95 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TISI Incorporated](https://appshunter.io/developer/463993929) | [Asuka Sawamura](https://appshunter.io/developer/1895836000) |

## 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


### Work Work SUN

[App page](https://appshunter.io/ios/app/work-work-sun/id6765925681)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告オフ | $1.99 | one-time |


## Frequently asked questions

### Is QA² free?

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

### Is Work Work SUN free?

Work Work SUN is free to download, with in-app purchases available.

### Do QA² or Work Work SUN have ads?

Work Work SUN shows ads; QA² does not.

### Which is updated more often, QA² or Work Work SUN?

QA² ships an update every 3 weeks, and Work Work SUN every 2 months. Most recently, QA² was updated on September 25, 2026 and Work Work SUN on September 18, 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.*