# Dual N vs Flash Focus

The clearest difference is review sentiment: Flash Focus at 100% against Dual N's 51%. Flash Focus also leads on ads (none vs shown). Dual N's advantage is update cadence (fortnightly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Dual N sells 2 in-app purchases, starting at $0.99 per month and Flash Focus sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Dual N ships an update fortnightly, Flash Focus every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Dual N | Flash Focus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (375 ratings)](https://appshunter.io/ios/app/dual-n-back-brain-training/id1578693948/reviews)** | — |
| Number of ratings | **375** | — |
| Positive reviews | 50.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 199 MB | 94 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GOKAKU SUPPLI, LIMITED LIABILITY CO.](https://appshunter.io/developer/1440310107) | [Fawqah](https://appshunter.io/developer/1853928056) |

## What reviewers say

### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back-brain-training/id1578693948)

This app is a brain game designed to improve working memory and cognitive skills through a challenging memory-training exercise. It offers customizable difficulty, goal setting, and global leaderboards to track progress. An ad-free experience is available via a subscription.

**Highlights:** Working memory training, Customizable difficulty (N-value, interval, session length), Goal setting and reminders, Global leaderboards, Multilingual support, Ad-free Pro version

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NBack Monthly Subscription | $0.99 | per month |
| Lifetime Pass | $12.99 | one-time |


### Flash Focus

[App page](https://appshunter.io/ios/app/flash-focus-train-your-brain/id6755442521)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove All Ads | $2.99 | one-time |


## Frequently asked questions

### Is Dual N free?

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

### Is Flash Focus free?

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

### Do Dual N or Flash Focus have ads?

Dual N shows ads; Flash Focus does not.

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

Dual N ships an update fortnightly, and Flash Focus every 2 months. Most recently, Dual N was updated on October 24, 2026 and Flash Focus 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.*