# 通貨換算 vs Ratewind

The clearest difference is in-app purchases: 通貨換算 at none against Ratewind's 1. 通貨換算 also leads on update cadence (daily vs every 3 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ratewind sells 1 one-off in-app purchase. 通貨換算 asks for nothing beyond the download.

通貨換算 ships an update daily, Ratewind every 3 days. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 通貨換算 | Ratewind |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 days |
| Size | 14 MB | 33 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KENICHI YAMAMOTO](https://appshunter.io/developer/1335325739) | [Kazuki Tamaribuchi](https://appshunter.io/developer/6796240923) |

## What reviewers say

### 通貨換算

[App page](https://appshunter.io/ios/app/id6749664483)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ratewind

[App page](https://appshunter.io/ios/app/ratewind-currency-converter/id6796240921)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ratewind Pro | $3.99 | one-time |


## Frequently asked questions

### Is 通貨換算 free?

通貨換算 is free to download, with no in-app purchases.

### Is Ratewind free?

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

### Do 通貨換算 or Ratewind have ads?

Neither 通貨換算 nor Ratewind shows ads.

### Which is updated more often, 通貨換算 or Ratewind?

通貨換算 ships an update daily, and Ratewind every 3 days. Most recently, 通貨換算 was updated on October 9, 2026 and Ratewind on October 18, 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.*