# Dual N vs NBack³

The clearest difference is ads: Dual N at none against NBack³'s shown. On price, review sentiment, update cadence and in-app purchases there is nothing between them.

Both are free to download. Dual N sells 5 in-app purchases, starting at $1.99 per month and NBack³ sells 1 in-app purchase, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

Dual N ships an update every 6 days, NBack³ every 4 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Dual N | NBack³ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (12 ratings)](https://appshunter.io/ios/app/dual-n-back-extreme/id6744034751/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 66.7% of reviews | **71.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 days | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 68 MB | 20 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Jatin Thakur](https://appshunter.io/developer/1805656547) | [Taiki Nishimura](https://appshunter.io/developer/1780302048) |

## What reviewers say

### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back-extreme/id6744034751)

This app offers brain-training exercises to enhance working memory, concentration, and problem-solving skills. It features multiple N-back modes, progress tracking, and customizable sessions in a user-friendly interface.

**Highlights:** Dual, Triple & Quad N-Back modes, Cognitive performance enhancement, Progress tracking and statistics, Customizable training sessions, User-friendly interface

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| N Back Extreme Monthly Subscription | $4.99 | per month |
| Six Months | $4.99 | per 6 months |
| 6 Months | $4.99 | per 6 months |
| N Back Extreme Yearly Subscription | $29.99 | per year |


### NBack³

[App page](https://appshunter.io/ios/app/nback-memory-training-game/id6745750227)

This brain training app uses the scientifically proven Dual N-Back method to enhance cognitive functions like working memory, focus, and decision-making. It offers adjustable difficulty levels and tracks progress with a visually engaging interface.

**Highlights:** Dual N-Back method, Adjustable difficulty (n=1-5), Enhances working memory, Improves inhibitory control, Develops attention skills, Progress tracking, Streak bonus system

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $0.49 | per month |


## Frequently asked questions

### Is Dual N free?

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

### Is NBack³ free?

NBack³ is free to download, with in-app purchases available.

### Do Dual N or NBack³ have ads?

NBack³ shows ads; Dual N does not.

### Which is updated more often, Dual N or NBack³?

Dual N ships an update every 6 days, and NBack³ every 4 days. Most recently, Dual N was updated on October 24, 2026 and NBack³ on October 7, 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.*