# Stroop! vs Dual N

The clearest difference is rating: Dual N at 4.6 against Stroop!'s 3.9. Dual N also leads on review sentiment (51% vs 25%) and ratings volume (375 vs 11). Stroop!'s advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Dual N sells 2 in-app purchases, starting at $0.99 per month. Stroop! asks for nothing beyond the download.

Dual N holds the better App Store score, 4.6 against 3.9. That said, the two scores are not equally well evidenced: Dual N has 375 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 25% of Stroop!'s written reviews are positive against 51% of Dual N's.

Stroop! ships an update every 2 weeks, Dual N fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Stroop! | Dual N |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (11 ratings)](https://appshunter.io/ios/app/stroop-brain-training/id1503193092/reviews) | **[4.6 (375 ratings)](https://appshunter.io/ios/app/dual-n-back-brain-training/id1578693948/reviews)** |
| Number of ratings | 11 | **375** |
| Positive reviews | 25.0% of reviews | **50.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 86 MB | 199 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yukihiro Kadono](https://appshunter.io/developer/1502517927) | [GOKAKU SUPPLI, LIMITED LIABILITY CO.](https://appshunter.io/developer/1440310107) |

## What reviewers say

### Stroop!

[App page](https://appshunter.io/ios/app/stroop-brain-training/id1503193092)

This colorful puzzle game challenges your perception and reaction time. Match the color of the word to the word's actual color, not the word itself, under a strict time limit. Compete for high scores in this engaging brain-training experience.

**Highlights:** Color word matching, Time-limited challenges, High score competition, Multilingual word support, Reverse Stroop Effect gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Stroop! free?

Stroop! 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, Stroop! or Dual N?

Dual N is rated higher. Stroop! averages 3.9 out of 5 from 11 ratings, while Dual N averages 4.6 from 375 ratings.

### Do Stroop! or Dual N have ads?

Both Stroop! and Dual N show ads.

### Which is updated more often, Stroop! or Dual N?

Stroop! ships an update every 2 weeks, and Dual N fortnightly. Most recently, Stroop! was updated on October 24, 2026 and Dual N on October 24, 2026.

---

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