# Unit Converter and Conversion vs UNITS MASTER

The clearest difference is price: Unit Converter and Conversion at Free against UNITS MASTER's $6.99. Unit Converter and Conversion also leads on rating (4.5 vs 4.3) and ratings volume (48 vs 6). UNITS MASTER's advantage is in-app purchases (none vs 1) and ads (none vs shown). On review sentiment and device support there is nothing between them.

Unit Converter and Conversion is free to download; UNITS MASTER costs $6.99 up front. Unit Converter and Conversion sells 1 one-off in-app purchase. UNITS MASTER asks for nothing beyond the download.

Unit Converter and Conversion holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Unit Converter and Conversion has 48 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 82% of Unit Converter and Conversion's written reviews are positive against 75% of UNITS MASTER's.

Unit Converter and Conversion ships an update every 10 months, UNITS MASTER every 4 months. The most recent releases landed on October 11, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Unit Converter and Conversion | UNITS MASTER |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/unit-converter-and-conversion/id1350107532/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/units-master/id1428926317/reviews) |
| Number of ratings | **48** | 6 |
| Positive reviews | **81.8% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 42 MB | 13 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Asad Ahsan](https://appshunter.io/developer/1326954499) | [Intemodino Group s.r.o.](https://appshunter.io/developer/557849644) |

## What reviewers say

### Unit Converter and Conversion

[App page](https://appshunter.io/ios/app/unit-converter-and-conversion/id1350107532)

This app offers a user-friendly interface for converting units across more than 40 categories, including length, weight, volume, and digital storage. It works offline and saves conversion history for future reference. Ideal for students and professionals needing quick and accurate conversions.

**Highlights:** Over 40 conversion categories, Offline functionality, Conversion history saving, User-friendly interface, Supports length, weight, volume, and more, Elegant graphics

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unit Converter Pro | $4.99 | one-time |


### UNITS MASTER

[App page](https://appshunter.io/ios/app/units-master/id1428926317)

This app is a comprehensive unit conversion calculator for length, distance, and area. It supports a vast array of US and metric units, offering both fractional and decimal calculations with customizable rounding. Users can also perform complex mathematical operations and access a calculation history.

**Highlights:** Extensive US and metric unit support, Fractional and decimal calculations, Customizable rounding precision, Complex calculation capabilities, Calculation history and sharing, Multiple output formats

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter and Conversion free?

Unit Converter and Conversion is free to download, with in-app purchases available.

### Is UNITS MASTER free?

UNITS MASTER costs $6.99, with no in-app purchases.

### Which has better reviews, Unit Converter and Conversion or UNITS MASTER?

Unit Converter and Conversion is rated higher. Unit Converter and Conversion averages 4.5 out of 5 from 48 ratings, while UNITS MASTER averages 4.3 from 6 ratings.

### Do Unit Converter and Conversion or UNITS MASTER have ads?

Unit Converter and Conversion shows ads; UNITS MASTER does not.

### Which is updated more often, Unit Converter and Conversion or UNITS MASTER?

Unit Converter and Conversion ships an update every 10 months, and UNITS MASTER every 4 months. Most recently, Unit Converter and Conversion was updated on October 11, 2026 and UNITS MASTER on September 29, 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.*