# 単位図鑑 vs Unit Conversion Math Drill2026

The clearest difference is price: 単位図鑑 at Free against Unit Conversion Math Drill2026's $0.29. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

単位図鑑 is free to download; Unit Conversion Math Drill2026 costs $0.29 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 単位図鑑 | Unit Conversion Math Drill2026 |
| --- | --- | --- |
| Price | **Free** | $0.29 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 2 MB | 6 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KOHEI YAMASHITA](https://appshunter.io/developer/1876841861) | [Nanjing Yunxiaochuang Technology Co., Ltd](https://appshunter.io/developer/1454457703) |

## What reviewers say

### 単位図鑑

[App page](https://appshunter.io/ios/app/id6760615566)

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

**In-app purchases:** none


### Unit Conversion Math Drill2026

[App page](https://appshunter.io/ios/app/unit-conversion-math-drill2026/id6780100716)

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

**In-app purchases:** none


## Frequently asked questions

### Is 単位図鑑 free?

単位図鑑 is free to download, with no in-app purchases.

### Is Unit Conversion Math Drill2026 free?

Unit Conversion Math Drill2026 costs $0.29, with no in-app purchases.

### Do 単位図鑑 or Unit Conversion Math Drill2026 have ads?

Neither 単位図鑑 nor Unit Conversion Math Drill2026 shows ads.

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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.*