# QA² vs Fermat's Math Puzzle

The clearest difference is in-app purchases: QA² at none against Fermat's Math Puzzle's 1. QA² also leads on ads (none vs shown) and iOS requirement (15.0 vs 26.0). Fermat's Math Puzzle's advantage is update cadence (weekly vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Fermat's Math Puzzle sells 1 one-off in-app purchase. QA² asks for nothing beyond the download.

QA² ships an update every 3 weeks, Fermat's Math Puzzle weekly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | QA² | Fermat's Math Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 180 MB | 8 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TISI Incorporated](https://appshunter.io/developer/463993929) | [Kenichi Horiuchi](https://appshunter.io/developer/1553401480) |

## 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


### Fermat's Math Puzzle

[App page](https://appshunter.io/ios/app/fermats-math-puzzle-merge/id6788619489)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | one-time |


## Frequently asked questions

### Is QA² free?

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

### Is Fermat's Math Puzzle free?

Fermat's Math Puzzle is free to download, with in-app purchases available.

### Do QA² or Fermat's Math Puzzle have ads?

Fermat's Math Puzzle shows ads; QA² does not.

### Which is updated more often, QA² or Fermat's Math Puzzle?

QA² ships an update every 3 weeks, and Fermat's Math Puzzle weekly. Most recently, QA² was updated on October 24, 2026 and Fermat's Math Puzzle on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*