# 単位計算機 vs US単位コンバーター

The clearest difference is update cadence: US単位コンバーター at every 3 weeks against 単位計算機's every 27 months. 単位計算機's advantage is iOS requirement (12.0 vs 16.4). On price, ads, 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.

単位計算機 ships an update every 27 months, US単位コンバーター every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 単位計算機 | US単位コンバーター |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (6 ratings)](https://appshunter.io/ios/app/id993194260/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 27 months | **Every 3 weeks** |
| Size | 8 MB | 41 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Seiji Nagano](https://appshunter.io/developer/689628441) | [Taiki Saito](https://appshunter.io/developer/995768398) |

## What reviewers say

### 単位計算機

[App page](https://appshunter.io/ios/app/id993194260)

**Features:** macOS Compatibility

**In-app purchases:** none


### US単位コンバーター

[App page](https://appshunter.io/ios/app/us/id1607728774)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 単位計算機 free?

単位計算機 is free to download, with no in-app purchases.

### Is US単位コンバーター free?

US単位コンバーター is free to download, with no in-app purchases.

### Do 単位計算機 or US単位コンバーター have ads?

Both 単位計算機 and US単位コンバーター show ads.

### Which is updated more often, 単位計算機 or US単位コンバーター?

単位計算機 ships an update every 27 months, and US単位コンバーター every 3 weeks. Most recently, 単位計算機 was updated on October 24, 2026 and US単位コンバーター on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*