# Dual N vs Color Code Guess

The clearest difference is in-app purchases: Color Code Guess at none against Dual N's 2. Color Code Guess also leads on update cadence (every 2 days vs fortnightly). On price, ads, 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. Color Code Guess asks for nothing beyond the download.

Dual N ships an update fortnightly, Color Code Guess every 2 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Dual N | Color Code Guess |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 199 MB | 69 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GOKAKU SUPPLI, LIMITED LIABILITY CO.](https://appshunter.io/developer/1440310107) | [ryota kamimura](https://appshunter.io/developer/1584398141) |

## 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 |


### Color Code Guess

[App page](https://appshunter.io/ios/app/color-code-guess/id6770061750)

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

**In-app purchases:** none


## Frequently asked questions

### Is Dual N free?

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

### Is Color Code Guess free?

Color Code Guess is free to download, with no in-app purchases.

### Do Dual N or Color Code Guess have ads?

Both Dual N and Color Code Guess show ads.

### Which is updated more often, Dual N or Color Code Guess?

Dual N ships an update fortnightly, and Color Code Guess every 2 days. Most recently, Dual N was updated on October 24, 2026 and Color Code Guess on October 12, 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.*