# n vs NBack 3D

The clearest difference is review sentiment: NBack 3D at 100% against n's 39%. NBack 3D also leads on rating (5.0 vs 3.0). n's advantage is in-app purchases (none vs 1) and ratings volume (44 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. NBack 3D sells 1 one-off in-app purchase. n asks for nothing beyond the download.

NBack 3D holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: n has 44 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 39% of n's written reviews are positive against 100% of NBack 3D's.

n ships an update every 12 months, NBack 3D every 10 months. The most recent releases landed on September 13, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | n | NBack 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (44 ratings)](https://appshunter.io/ios/app/n-back/id551544969/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nback-3d/id1407606652/reviews)** |
| Number of ratings | **44** | 1 |
| Positive reviews | 38.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 12 months | **Every 10 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 5 MB | 5 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dicwizard.jp](https://appshunter.io/developer/288699111) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### n

[App page](https://appshunter.io/ios/app/n-back/id551544969)

Enhance your working memory with this brain training application. It challenges you to recall past information by selecting difficulty levels and memorizing digits from addition problems.

**Highlights:** Working memory training, Adjustable difficulty levels (1-10), Memorization of addition problem digits, Tap last digit of previous answers, N-back exercise implementation

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

**In-app purchases:** none


### NBack 3D

[App page](https://appshunter.io/ios/app/nback-3d/id1407606652)

This app challenges your memory by requiring you to count 3D shapes of specific colors. As the 'N' value increases, the difficulty escalates, testing your ability to recall past stimuli in a sequence.

**Highlights:** N-Back memory challenge, 3D shape and color recognition, Increasing difficulty levels, Sequence memorization, Cognitive skill enhancement

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extend to 20'Back & Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is n free?

n is free to download, with no in-app purchases.

### Is NBack 3D free?

NBack 3D is free to download, with in-app purchases available.

### Which has better reviews, n or NBack 3D?

NBack 3D is rated higher. n averages 3.0 out of 5 from 44 ratings, while NBack 3D averages 5.0 from 1 ratings.

### Do n or NBack 3D have ads?

Both n and NBack 3D show ads.

### Which is updated more often, n or NBack 3D?

n ships an update every 12 months, and NBack 3D every 10 months. Most recently, n was updated on September 13, 2026 and NBack 3D on September 11, 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.*