# N'Back vs Random Quiz

The clearest difference is in-app purchases: Random Quiz at none against N'Back's 1. Random Quiz also leads on update cadence (every 5 days vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. N'Back sells 1 one-off in-app purchase. Random Quiz asks for nothing beyond the download.

N'Back ships an update every 9 months, Random Quiz every 5 days. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | N'Back | Random Quiz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/nback/id591320567/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 3 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) |

## What reviewers say

### N'Back

[App page](https://appshunter.io/ios/app/nback/id591320567)

Enhance sensory and working memory with this brain training application. It offers various modes to test your ability to recall sequences of numbers, progressing through different 'N' levels.

**Highlights:** Sensory memory improvement, Working memory enhancement, N'Back exercises, Flash Mode, Slow Mode, Step Mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Levels (3'Back-10'Back) and Remove Ads | $2.99 | one-time |


### Random Quiz

[App page](https://appshunter.io/ios/app/random-quiz/id6744266408)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is N'Back free?

N'Back is free to download, with in-app purchases available.

### Is Random Quiz free?

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

### Do N'Back or Random Quiz have ads?

Both N'Back and Random Quiz show ads.

### Which is updated more often, N'Back or Random Quiz?

N'Back ships an update every 9 months, and Random Quiz every 5 days. Most recently, N'Back was updated on October 3, 2026 and Random Quiz on October 6, 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.*