# n vs Dual N

The clearest difference is rating: Dual N at 4.3 against n's 3.0. Dual N also leads on ads (none vs shown) and update cadence (every 10 days vs every 12 months). n's advantage is in-app purchases (none vs 2) and device support (3 vs 1). On price and ratings volume there is nothing between them.

Both are free to download. Dual N sells 2 in-app purchases, starting at $1.99 per month. n asks for nothing beyond the download.

Dual N holds the better App Store score, 4.3 against 3.0. Both are backed by a comparable volume of ratings — 44 and 19 respectively. Written reviews point the same way: 39% of n's written reviews are positive against 48% of Dual N's.

n ships an update every 12 months, Dual N every 10 days. The most recent releases landed on November 6, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | n | Dual N |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (44 ratings)](https://appshunter.io/ios/app/n-back/id551544969/reviews) | **[4.3 (19 ratings)](https://appshunter.io/ios/app/dual-n-back-adhd-focus-game/id1568448504/reviews)** |
| Number of ratings | **44** | 19 |
| Positive reviews | 38.9% of reviews | **48.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 10 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 5 MB | 41 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [dicwizard.jp](https://appshunter.io/developer/288699111) | [Hiromi Fujita](https://appshunter.io/developer/1364801021) |

## What reviewers say

### n

[App page](https://appshunter.io/ios/app/n-back/id551544969)

Enhance your working memory with this brain training application. It challenges you to recall past information by selecting difficulty levels and memorizing digits from addition problems.

**Highlights:** Working memory training, Adjustable difficulty levels (1-10), Memorization of addition problem digits, Tap last digit of previous answers, N-back exercise implementation

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

**In-app purchases:** none


### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back-adhd-focus-game/id1568448504)

This scientifically proven brain training app enhances working memory, concentration, and cognitive abilities. It helps improve IQ, memory, and thinking speed through engaging gameplay that challenges your brain. Consistent practice leads to noticeable improvements in focus and mental agility.

**Highlights:** Strengthens working memory, Improves concentration, Enhances cognitive abilities, Difficulty adjustment (N-2 to N-5), Progress visualization with graphs, Statistics and calendar tracking, Global player rankings

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Features | $1.99 | per month |
| Annual Premium Features | $19.99 | per year |


## Frequently asked questions

### Is n free?

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

### Is Dual N free?

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

### Which has better reviews, n or Dual N?

Dual N is rated higher. n averages 3.0 out of 5 from 44 ratings, while Dual N averages 4.3 from 19 ratings.

### Do n or Dual N have ads?

n shows ads; Dual N does not.

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

n ships an update every 12 months, and Dual N every 10 days. Most recently, n was updated on November 6, 2026 and Dual N on November 11, 2026.

---

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