# Unit Converter 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's 4. Unit Converter's advantage is update cadence (every 9 days vs every 2 months) and device support (5 vs 2). On price and ads there is nothing between them.

Both are free to download. Unit Converter sells 4 in-app purchases, starting at $0.99 per month. Engineering 單位流量換算 asks for nothing beyond the download.

Unit Converter ships an update every 9 days, Engineering 單位流量換算 every 2 months. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Unit Converter | Engineering 單位流量換算 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (17 ratings)](https://appshunter.io/ios/app/unit-converter-uneat/id1668309493/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 15 MB | 4 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZIJIAN CHEN](https://appshunter.io/developer/1668309495) | [CHUNG-HSIEN YU](https://appshunter.io/developer/1872617732) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-uneat/id1668309493)

This utility app offers conversion for over 100 units across 18 categories, including length, mass, temperature, and digital storage. It supports a wide range of specific units within each category and provides a clean, ad-free interface for quick conversions.

**Highlights:** 18 unit categories, Over 100 units supported, Ad-free experience, Supports multiple devices, Pro version with free trial

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version (1 Month) | $0.99 | per month |
| 1 cup of orange juice. | $0.99 | one-time |
| 1 litre of orange juice. | $2.99 | one-time |
| Pro Version (Lifetime) | $3.99 | 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 free?

Unit Converter 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 or Engineering 單位流量換算 have ads?

Neither Unit Converter nor Engineering 單位流量換算 shows ads.

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

Unit Converter ships an update every 9 days, and Engineering 單位流量換算 every 2 months. Most recently, Unit Converter was updated on October 4, 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.*