# memoryOS vs Dual N

The clearest difference is rating: memoryOS at 4.9 against Dual N's 3.8. memoryOS also leads on ads (none vs shown) and ratings volume (17K vs 4). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. memoryOS sells 9 in-app purchases, starting at $5.99 per month and Dual N sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

memoryOS holds the better App Store score, 4.9 against 3.8. That said, the two scores are not equally well evidenced: memoryOS has 17K ratings behind it against 4, so its average is the more settled of the two.

## The numbers

| Metric | memoryOS | Dual N |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (17K ratings)](https://appshunter.io/ios/app/memoryos-memory-games/id1553283646/reviews)** | [3.8 (4 ratings)](https://appshunter.io/ios/app/dual-n-back-memory-trainer/id6759211886/reviews) |
| Number of ratings | **17K** | 4 |
| Positive reviews | 80.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | **#63** | — |
| Size | 232 MB | 27 MB |
| Requires iOS | **15.2** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Encoder Inc.](https://appshunter.io/developer/1524669695) | [Konstanty Koszewski](https://appshunter.io/developer/1871696981) |

## What reviewers say

### memoryOS

[App page](https://appshunter.io/ios/app/memoryos-memory-games/id1553283646)

**Currently charting:** #63 Top Grossing · Education, #75 Top Free · Education (US App Store)

Enhance your memory with interactive lessons and a 3D virtual mind palace game. This app uses scientifically proven techniques like spaced repetition to boost long-term memory storage and knowledge retention. It's designed to make memorization skills joyful and effective for everyone.

**Highlights:** Interactive memory lessons, 3D Virtual Mind Palaces, Spaced repetition system, Gamified learning, Memorize names, lists, numbers, and more, Advanced study techniques

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Monthly Plan | $5.99 | per month |
| Essential Weekly Plan | $6.99 | per 7 days |
| Essential Monthly Plan | $15.99 | per month |
| Expert Monthly Plan | $27.99 | per month |
| Essential Annual Plan | $89.99 | per year |
| Expert Annual Plan | $148.99 | per year |
| Expert Annual Plan | $149.99 | per year |
| Expert Annual Plan | $159.99 | per year |
| Expert Annual Plan | $159.99 | per year |

**What reviewers like**

- 🚀 Effective memory techniques
- 👍 Interactive and engaging
- 💡 Innovative use of memory palaces
- 🤩 Impressive results in a short time
- 🎉 Fun and enjoyable to use

**What reviewers complain about**

- 💰 Expensive subscription model
- 🐛 Buggy and crashes frequently
- 🤔 Confusing navigation and UI
- 🔒 Lack of transparency around pricing
- 🙄 Aggressive upselling and marketing tactics

**Reported bugs**

- Login issues and account management problems
- Frequent crashes and app instability
- Navigation and UI elements not working as expected
- Syncing issues between devices and lost progress
- Connectivity problems when using cellular data

**Requested features**

- More free content and lessons
- Ability to create custom memory palaces
- Better progress tracking and analytics
- Integration with other learning/productivity apps
- Offline mode for lessons and memory palaces


### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back-memory-trainer/id6759211886)

This app offers structured cognitive training to enhance working memory and focus. It features adaptive challenges, detailed session metrics, and long-term progress tracking. Users can customize their training environment and follow guided plans for measurable improvements.

**Highlights:** Adaptive Dual N-Back training, Session metrics and analytics, Long-term progress charts, Guided training plans, Customizable training environment, Low-distraction UI

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dual N-back Monthly Premium | $3.99 | per month |
| Dual N-back Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is memoryOS free?

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

### Is Dual N free?

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

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

memoryOS is rated higher. memoryOS averages 4.9 out of 5 from 17K ratings, while Dual N averages 3.8 from 4 ratings.

### Do memoryOS or Dual N have ads?

Dual N shows ads; memoryOS does not.

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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.*