# KanjiPelmanism byNSDev vs ArithmeticWorkOut

The clearest difference is ads: KanjiPelmanism byNSDev at none against ArithmeticWorkOut's shown. ArithmeticWorkOut's advantage is update cadence (every 12 months vs every 39 months) and iOS requirement (13.0 vs 15.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KanjiPelmanism byNSDev ships an update every 39 months, ArithmeticWorkOut every 12 months. The most recent releases landed on June 1, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | KanjiPelmanism byNSDev | ArithmeticWorkOut |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 39 months | **Every 12 months** |
| Size | 17 MB | 67 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [hideaki fukumura](https://appshunter.io/developer/1629984757) |

## What reviewers say

### KanjiPelmanism byNSDev

[App page](https://appshunter.io/ios/app/kanjipelmanism-bynsdev/id1275040699)

**Features:** macOS Compatibility

**In-app purchases:** none


### ArithmeticWorkOut

[App page](https://appshunter.io/ios/app/arithmeticworkout/id1632108931)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KanjiPelmanism byNSDev free?

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

### Is ArithmeticWorkOut free?

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

### Do KanjiPelmanism byNSDev or ArithmeticWorkOut have ads?

ArithmeticWorkOut shows ads; KanjiPelmanism byNSDev does not.

### Which is updated more often, KanjiPelmanism byNSDev or ArithmeticWorkOut?

KanjiPelmanism byNSDev ships an update every 39 months, and ArithmeticWorkOut every 12 months. Most recently, KanjiPelmanism byNSDev was updated on June 1, 2026 and ArithmeticWorkOut on September 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.*