# NBack 3D vs NBack³

The clearest difference is update cadence: NBack³ at every 4 days against NBack 3D's every 10 months. NBack 3D's advantage is review sentiment (100% vs 71%) and iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. NBack 3D sells 1 one-off in-app purchase and NBack³ sells 1 in-app purchase, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

NBack 3D ships an update every 10 months, NBack³ every 4 days. The most recent releases landed on September 11, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | NBack 3D | NBack³ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nback-3d/id1407606652/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 71.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 5 MB | 20 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Taiki Nishimura](https://appshunter.io/developer/1780302048) |

## What reviewers say

### 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 |


### NBack³

[App page](https://appshunter.io/ios/app/nback-memory-training-game/id6745750227)

This brain training app uses the scientifically proven Dual N-Back method to enhance cognitive functions like working memory, focus, and decision-making. It offers adjustable difficulty levels and tracks progress with a visually engaging interface.

**Highlights:** Dual N-Back method, Adjustable difficulty (n=1-5), Enhances working memory, Improves inhibitory control, Develops attention skills, Progress tracking, Streak bonus system

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $0.49 | per month |


## Frequently asked questions

### Is NBack 3D free?

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

### Is NBack³ free?

NBack³ is free to download, with in-app purchases available.

### Do NBack 3D or NBack³ have ads?

Both NBack 3D and NBack³ show ads.

### Which is updated more often, NBack 3D or NBack³?

NBack 3D ships an update every 10 months, and NBack³ every 4 days. Most recently, NBack 3D was updated on September 11, 2026 and NBack³ on August 14, 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.*