# 鬼計算 vs N

The clearest difference is in-app purchases: 鬼計算 at none against N's 1. 鬼計算 also leads on iOS requirement (15.2 vs 26.0). N's advantage is update cadence (every 4 days vs every 5 months). On price, ads 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. 鬼計算 asks for nothing beyond the download.

鬼計算 ships an update every 5 months, N every 4 days. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 鬼計算 | N |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 4 days** |
| Size | 12 MB | 21 MB |
| Requires iOS | **15.2** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [masaaki genno](https://appshunter.io/developer/1611455396) | [chunson yamada](https://appshunter.io/developer/1538754889) |

## What reviewers say

### 鬼計算

[App page](https://appshunter.io/ios/app/hp/id1613670633)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 鬼計算 free?

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

### Is N free?

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

### Do 鬼計算 or N have ads?

Both 鬼計算 and N show ads.

### Which is updated more often, 鬼計算 or N?

鬼計算 ships an update every 5 months, and N every 4 days. Most recently, 鬼計算 was updated on October 8, 2026 and N on October 9, 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.*