# US Unit Converter vs US単位コンバーター

The clearest difference is in-app purchases: US単位コンバーター at none against US Unit Converter's 1. US単位コンバーター also leads on update cadence (every 3 weeks vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. US Unit Converter sells 1 one-off in-app purchase. US単位コンバーター asks for nothing beyond the download.

US Unit Converter ships an update every 6 months, US単位コンバーター every 3 weeks. The most recent releases landed on September 22, 2026 and June 20, 2026 respectively.

## The numbers

| Metric | US Unit Converter | US単位コンバーター |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (108 ratings)](https://appshunter.io/ios/app/us-unit-converter/id1577905442/reviews)** | — |
| Number of ratings | **108** | — |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 41 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kei Suefuji](https://appshunter.io/developer/1388335881) | [Taiki Saito](https://appshunter.io/developer/995768398) |

## What reviewers say

### US Unit Converter

[App page](https://appshunter.io/ios/app/us-unit-converter/id1577905442)

Easily convert between US customary units and the International System of Units for various measurements like length, weight, area, volume, and temperature. Access conversion history and remove ads with a premium upgrade.

**Highlights:** Length conversion, Weight conversion, Area conversion, Liquid volume conversion, Temperature conversion, Conversion history, Ad-free option

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM | $3.99 | one-time |


### 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 US Unit Converter free?

US Unit Converter is free to download, with in-app purchases available.

### 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 US Unit Converter or US単位コンバーター have ads?

Both US Unit Converter and US単位コンバーター show ads.

### Which is updated more often, US Unit Converter or US単位コンバーター?

US Unit Converter ships an update every 6 months, and US単位コンバーター every 3 weeks. Most recently, US Unit Converter was updated on September 22, 2026 and US単位コンバーター on June 20, 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.*