# NBack³ vs NBackCalc

The clearest difference is ads: NBackCalc at none against NBack³'s shown. NBackCalc also leads on update cadence (every 2 days vs every 4 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

NBack³ ships an update every 4 days, NBackCalc every 2 days. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | NBack³ | NBackCalc |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Taiki Nishimura](https://appshunter.io/developer/1780302048) | [YOSHINORI KONNO](https://appshunter.io/developer/1883074860) |

## What reviewers say

### 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 |


### NBackCalc

[App page](https://appshunter.io/ios/app/nbackcalc-working-memory/id6760832395)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 開発者を応援する | $0.99 | one-time |


## Frequently asked questions

### Is NBack³ free?

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

### Is NBackCalc free?

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

### Do NBack³ or NBackCalc have ads?

NBack³ shows ads; NBackCalc does not.

### Which is updated more often, NBack³ or NBackCalc?

NBack³ ships an update every 4 days, and NBackCalc every 2 days. Most recently, NBack³ was updated on October 7, 2026 and NBackCalc on October 1, 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.*