# Japan vs Scale Switch

The clearest difference is in-app purchases: Scale Switch at none against Japan's 1. Scale Switch also leads on ads (none vs shown) and rating (5.0 vs 4.7). Japan's advantage is update cadence (weekly vs every 4 months) and ratings volume (21 vs 1). On price and device support there is nothing between them.

Both are free to download. Japan sells 1 one-off in-app purchase. Scale Switch asks for nothing beyond the download.

Scale Switch holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Japan has 21 ratings behind it against 1, so its average is the more settled of the two.

Japan ships an update weekly, Scale Switch every 4 months. The most recent releases landed on November 12, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Japan | Scale Switch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (21 ratings)](https://appshunter.io/ios/app/japan-us-unit-conversion/id6450624167/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scale-switch/id6740058611/reviews)** |
| Number of ratings | **21** | 1 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 2 MB |
| Requires iOS | **16.2** | 18.1 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Koya Nambo](https://appshunter.io/developer/1633778504) | [Alberto Purpura](https://appshunter.io/developer/1661532927) |

## What reviewers say

### Japan

[App page](https://appshunter.io/ios/app/japan-us-unit-conversion/id6450624167)

Easily convert between Japanese and US units for length, weight, speed, volume, temperature, area, currency, and time zones. Ideal for travel, daily life, work, and study.

**Highlights:** Length conversion, Weight conversion, Speed conversion, Volume conversion, Temperature conversion, Area conversion, Currency conversion, Time zone conversion

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

**In-app purchases (1)**

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


### Scale Switch

[App page](https://appshunter.io/ios/app/scale-switch/id6740058611)

This utility app simplifies unit conversions with an intuitive interface. Easily convert between various units for time, data, temperature, area, volume, and more. It's designed for quick, reliable conversions on the go.

**Highlights:** Easy-to-use interface for conversions, Wide range of supported units, Converts time, data, temperature, area, volume, and more, Intuitive and clutter-free design, Quick and reliable results, Supports various measurement systems

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Japan free?

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

### Is Scale Switch free?

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

### Which has better reviews, Japan or Scale Switch?

Scale Switch is rated higher. Japan averages 4.7 out of 5 from 21 ratings, while Scale Switch averages 5.0 from 1 ratings.

### Do Japan or Scale Switch have ads?

Japan shows ads; Scale Switch does not.

### Which is updated more often, Japan or Scale Switch?

Japan ships an update weekly, and Scale Switch every 4 months. Most recently, Japan was updated on November 12, 2026 and Scale Switch on October 30, 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.*