# Unit Converter & Currency vs Engineering 單位流量換算

The clearest difference is in-app purchases: Engineering 單位流量換算 at none against Unit Converter & Currency's 3. Engineering 單位流量換算 also leads on ads (none vs shown). Unit Converter & Currency's advantage is iOS requirement (15.6 vs 17.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Unit Converter & Currency sells 3 in-app purchases, starting at $1.29 per month. Engineering 單位流量換算 asks for nothing beyond the download.

Unit Converter & Currency ships an update every 3 months, Engineering 單位流量換算 every 2 months. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Unit Converter & Currency | Engineering 單位流量換算 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unit-converter-and-currency/id6479210637/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 4 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [长宏 侯](https://appshunter.io/developer/1726037103) | [CHUNG-HSIEN YU](https://appshunter.io/developer/1872617732) |

## What reviewers say

### Unit Converter & Currency

[App page](https://appshunter.io/ios/app/unit-converter-and-currency/id6479210637)

This app offers a comprehensive unit conversion tool with a clean interface and extensive customization options. It supports offline use and includes a currency converter, making it a versatile utility for various conversion needs.

**Highlights:** Offline unit conversion, Currency converter, 32 unit categories, Convert as you type, Customizable units and formats, Dark and light modes, iCloud data sync

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $1.29 | per month |
| Pro (Yearly) | $12.99 | per year |
| Remove Ads | $2.99 | one-time |


### Engineering 單位流量換算

[App page](https://appshunter.io/ios/app/engineering/id6758377219)

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter & Currency free?

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

### Is Engineering 單位流量換算 free?

Engineering 單位流量換算 is free to download, with no in-app purchases.

### Do Unit Converter & Currency or Engineering 單位流量換算 have ads?

Unit Converter & Currency shows ads; Engineering 單位流量換算 does not.

### Which is updated more often, Unit Converter & Currency or Engineering 單位流量換算?

Unit Converter & Currency ships an update every 3 months, and Engineering 單位流量換算 every 2 months. Most recently, Unit Converter & Currency was updated on October 24, 2026 and Engineering 單位流量換算 on October 5, 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.*