# N vs NBackCalc

The clearest difference is ads: NBackCalc at none against N's shown. NBackCalc also leads on update cadence (every 2 days vs every 4 days) and iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. N sells 1 in-app purchase, starting at $0.99 per month and NBackCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

N ships an update every 4 days, NBackCalc every 2 days. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | N | NBackCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Every 2 days** |
| Size | 21 MB | 1 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [chunson yamada](https://appshunter.io/developer/1538754889) | [YOSHINORI KONNO](https://appshunter.io/developer/1883074860) |

## What reviewers say

### N

[App page](https://appshunter.io/ios/app/n-back-training/id1627478554)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| １ヶ月プラン | $0.99 | 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 N free?

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

### Is NBackCalc free?

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

### Do N or NBackCalc have ads?

N shows ads; NBackCalc does not.

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

N ships an update every 4 days, and NBackCalc every 2 days. Most recently, N was updated on October 9, 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.*