# Quantum Sudoky vs Memory Quest

The clearest difference is ads: Quantum Sudoky at none against Memory Quest's shown. Memory Quest's advantage is update cadence (weekly vs every 4 weeks) and device support (3 vs 1). On price, in-app purchases 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.

Quantum Sudoky ships an update every 4 weeks, Memory Quest weekly. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Quantum Sudoky | Memory Quest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Weekly** |
| Size | 4 MB | 66 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [忆倩 刘](https://appshunter.io/developer/1492807169) | [Mansur Gulomov](https://appshunter.io/developer/1657144977) |

## What reviewers say

### Quantum Sudoky

[App page](https://appshunter.io/ios/app/quantum-sudoky/id6461165891)

**Features:** macOS Compatibility

**In-app purchases:** none


### Memory Quest

[App page](https://appshunter.io/ios/app/memory-quest-brain-game/id6787847857)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quantum Sudoky free?

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

### Is Memory Quest free?

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

### Do Quantum Sudoky or Memory Quest have ads?

Memory Quest shows ads; Quantum Sudoky does not.

### Which is updated more often, Quantum Sudoky or Memory Quest?

Quantum Sudoky ships an update every 4 weeks, and Memory Quest weekly. Most recently, Quantum Sudoky was updated on October 11, 2026 and Memory Quest on October 25, 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.*