# Decodoku vs Quantum

The clearest difference is update cadence: Quantum at every 4 days against Decodoku's every 3 months. Decodoku's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 17.6). On price, 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.

Decodoku ships an update every 3 months, Quantum every 4 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Decodoku | Quantum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/decodoku/id1093080064/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 52 MB | 1 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [James Robin Wootton](https://appshunter.io/developer/1093080063) | [Celal Can Sagnak](https://appshunter.io/developer/1865753496) |

## What reviewers say

### Decodoku

[App page](https://appshunter.io/ios/app/decodoku/id1093080064)

Engage in a unique puzzle game that doubles as a tool for scientific research in quantum error correction. Solve complex challenges to help advance the development of real-life quantum computers. Explore the science behind the game on the developer's website.

**Highlights:** Quantum puzzle gameplay, Scientific research tool, Quantum error correction, Advance quantum computing, Educational science content

**In-app purchases:** none


### Quantum

[App page](https://appshunter.io/ios/app/quantum-cat/id6759192936)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decodoku free?

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

### Is Quantum free?

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

### Do Decodoku or Quantum have ads?

Neither Decodoku nor Quantum shows ads.

### Which is updated more often, Decodoku or Quantum?

Decodoku ships an update every 3 months, and Quantum every 4 days. Most recently, Decodoku was updated on October 24, 2026 and Quantum on October 25, 2026.

---

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