# Unit Converter vs Length Mass Speed Converter

The clearest difference is rating: Length Mass Speed Converter at 4.6 against Unit Converter's 2.0. Length Mass Speed Converter also leads on update cadence (every 4 months vs every 9 months). Unit Converter's advantage is in-app purchases (none vs 1). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Length Mass Speed Converter sells 1 in-app purchase, starting at $14.99 per month. Unit Converter asks for nothing beyond the download.

Length Mass Speed Converter holds the better App Store score, 4.6 against 2.0. Both are backed by a comparable volume of ratings — 7 and 14 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

Unit Converter ships an update every 9 months, Length Mass Speed Converter every 4 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Unit Converter | Length Mass Speed Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (7 ratings)](https://appshunter.io/ios/app/unit-converter/id1124416229/reviews) | **[4.6 (14 ratings)](https://appshunter.io/ios/app/length-mass-speed-converter/id1421135749/reviews)** |
| Number of ratings | 7 | **14** |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Every 4 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 33 MB | 7 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yunus Kilinc](https://appshunter.io/developer/1093264121) | [AR Code Pte. Ltd.](https://appshunter.io/developer/1761134422) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter/id1124416229)

This application offers a professional and user-friendly interface for converting between various units. It supports over 300 units across more than 20 categories, including currency, temperature, and length.

**Highlights:** Impressive design, Convenient interface, Easy to use, Over 20 categories, More than 300 units, Currency conversion, Temperature conversion

**Features:** macOS Compatibility

**In-app purchases:** none


### Length Mass Speed Converter

[App page](https://appshunter.io/ios/app/length-mass-speed-converter/id1421135749)

Easily convert between various units of measurement across 15 categories, including length, mass, volume, speed, and temperature. Offers a premium subscription for advanced features and an ad-free experience.

**Highlights:** Distance/length conversions, Area conversions, Volume conversions, Mass conversions, Speed conversions, Temperature conversions, 15 measurement categories

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Converter Premium | $14.99 | per month |


## Frequently asked questions

### Is Unit Converter free?

Unit Converter is free to download, with no in-app purchases.

### Is Length Mass Speed Converter free?

Length Mass Speed Converter is free to download, with in-app purchases available.

### Which has better reviews, Unit Converter or Length Mass Speed Converter?

Length Mass Speed Converter is rated higher. Unit Converter averages 2.0 out of 5 from 7 ratings, while Length Mass Speed Converter averages 4.6 from 14 ratings.

### Do Unit Converter or Length Mass Speed Converter have ads?

Both Unit Converter and Length Mass Speed Converter show ads.

### Which is updated more often, Unit Converter or Length Mass Speed Converter?

Unit Converter ships an update every 9 months, and Length Mass Speed Converter every 4 months. Most recently, Unit Converter was updated on November 2, 2026 and Length Mass Speed Converter on November 2, 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.*