# Dual vs N

The clearest difference is price: N at Free against Dual's $0.99. Dual's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

N is free to download; Dual costs $0.99 up front. N sells 1 in-app purchase, starting at $1.99 per month. Dual asks for nothing beyond the download.

Dual ships an update every 2 days, N every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Dual | N |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/dual-n-back/id6744232772/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | Paid | — |
| Size | 1 MB | 5 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Tang](https://appshunter.io/developer/1806563018) | [Toru Fukui](https://appshunter.io/developer/1888097145) |

## What reviewers say

### Dual

[App page](https://appshunter.io/ios/app/dual-n-back/id6744232772)

This cognitive training game is designed to enhance working memory through a simple yet challenging experience. It offers a clean interface with detailed history tracking and customizable gameplay and aesthetics. All data is stored locally for enhanced privacy.

**Highlights:** Working memory improvement, Detailed game history, Replay previous rounds, Gameplay customization, Aesthetic customization, Local data storage

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

**In-app purchases:** none


### N

[App page](https://appshunter.io/ios/app/n-back-brain-trainer/id6761675343)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $1.99 | per month |


## Frequently asked questions

### Is Dual free?

Dual costs $0.99, with no in-app purchases.

### Is N free?

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

### Do Dual or N have ads?

N shows ads; Dual does not.

### Which is updated more often, Dual or N?

Dual ships an update every 2 days, and N every 3 days. Most recently, Dual was updated on October 24, 2026 and N 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.*