# MindSpan Memory Booster vs Dual N

The clearest difference is review sentiment: Dual N at 48% against MindSpan Memory Booster's 0%. Dual N also leads on ratings volume (19 vs 2). MindSpan Memory Booster's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 2). On price, update cadence and ads there is nothing between them.

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

MindSpan Memory Booster holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Dual N has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 0% of MindSpan Memory Booster's written reviews are positive against 48% of Dual N's, so the app with the better star average is not the one people write more warmly about.

MindSpan Memory Booster ships an update fortnightly, Dual N every 10 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | MindSpan Memory Booster | Dual N |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mindspan-memory-booster/id1111781150/reviews)** | [4.3 (19 ratings)](https://appshunter.io/ios/app/dual-n-back-adhd-focus-game/id1568448504/reviews) |
| Number of ratings | 2 | **19** |
| Positive reviews | 0.0% of reviews | **48.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 41 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bothina Elzoobi](https://appshunter.io/developer/991489487) | [Hiromi Fujita](https://appshunter.io/developer/1364801021) |

## What reviewers say

### MindSpan Memory Booster

[App page](https://appshunter.io/ios/app/mindspan-memory-booster/id1111781150)

Train your working memory with a simple yet challenging game. Observe moving shapes and recall their details like color and pattern to progress. Improve your cognitive skills essential for learning and focus.

**Highlights:** Observe and recall moving geometric shapes, Identify shape, color, and pattern, Increasing difficulty with speed and complexity, Trains working memory and cognitive skills, Focuses on fluid intelligence and learning ability

**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 MindSpan Memory Booster free?

MindSpan Memory Booster 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, MindSpan Memory Booster or Dual N?

MindSpan Memory Booster is rated higher. MindSpan Memory Booster averages 5.0 out of 5 from 2 ratings, while Dual N averages 4.3 from 19 ratings.

### Do MindSpan Memory Booster or Dual N have ads?

Neither MindSpan Memory Booster nor Dual N shows ads.

### Which is updated more often, MindSpan Memory Booster or Dual N?

MindSpan Memory Booster ships an update fortnightly, and Dual N every 10 days. Most recently, MindSpan Memory Booster was updated on October 24, 2026 and Dual N on October 24, 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.*