# N vs Dual N

The clearest difference is ads: N at none against Dual N's shown. N also leads on ratings volume (239 vs 3). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. N sells 7 in-app purchases, starting at $8.99 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.

On the App Store both sit at effectively the same score — 4.7 for N against 4.7 for Dual N. That said, the two scores are not equally well evidenced: N has 239 ratings behind it against 3, so its average is the more settled of the two.

## The numbers

| Metric | N | Dual N |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (239 ratings)](https://appshunter.io/ios/app/n-back-challenge/id1524599079/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/dual-n-back-memory-trainer/id6759211886/reviews) |
| Number of ratings | **239** | 3 |
| Positive reviews | 82.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | — |
| Monetization | Free with in-app purchases | — |
| Size | 72 MB | 27 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Rivuspurus](https://appshunter.io/developer/1171945549) | [Konstanty Koszewski](https://appshunter.io/developer/1871696981) |

## What reviewers say

### N

[App page](https://appshunter.io/ios/app/n-back-challenge/id1524599079)

This app offers a scientifically validated cognitive training program designed to enhance intelligence. It uses the dual n-back method to improve learning, reasoning, and problem-solving skills. Track progress, compete with friends, and customize your experience to boost cognitive abilities.

**Highlights:** Dual n-back cognitive training, IQ enhancement, Progress tracking and streaks, Social competition and leaderboards, Customizable voices and settings, Weekly habit option

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (monthly) | $8.99 | per month |
| Premium (annual) | $54.99 | per year |
| 1 cup of coffee | $1.99 | one-time |
| 4 cups of coffee | $5.99 | one-time |
| Pizza | $7.99 | one-time |
| 7  cups of coffee | $8.99 | one-time |
| 10  cups of coffee | $10.99 | one-time |

**What reviewers like**

- 🧠 Effective working memory improvement
- 🎮 Excellent gamification and motivation system
- 💰 Free to use with affordable payment options
- 🎨 Clean, polished, intuitive user interface
- 📚 Scientifically-backed with educational articles

**What reviewers complain about**

- 🐛 Frequent mid-session freezes and crashes
- 🔊 Unclear letter pronunciation (some letters sound similar)
- 💳 Controversial 'coffee' paywall for missed days
- 🔌 Requires internet connection (not offline compatible)
- ⚠️ Inconsistent instant feedback on answers

**Reported bugs**

- Mid-session freezing and soft locks (most common)
- Sound not generating for letters during gameplay
- Buttons greyed out preventing interaction
- App crashes when accessing stats
- Double coffee charge on streak breaks

**Requested features**

- Single n-back and quad n-back modes
- Lock screen widgets for streak reminders
- Color-position dual n-back mode
- More granular settings (interference, probability, trial count)
- Penalty system for incorrect answers


### Dual N

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

**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 N free?

N 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, N or Dual N?

N is rated higher. N averages 4.7 out of 5 from 239 ratings, while Dual N averages 4.7 from 3 ratings.

### Do N or Dual N have ads?

Dual N shows ads; N 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.*