# Unit Converter vs The Conversion App

The clearest difference is review sentiment: Unit Converter at 88% against The Conversion App's 45%. Unit Converter also leads on rating (4.8 vs 4.1) and update cadence (every 6 days vs every 5 weeks). The Conversion App's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Unit Converter sells 3 in-app purchases, starting at $0.99 per month. The Conversion App asks for nothing beyond the download.

Unit Converter holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: Unit Converter has 1.5K ratings behind it against 60, so its average is the more settled of the two. Written reviews point the same way: 88% of Unit Converter's written reviews are positive against 45% of The Conversion App's.

Unit Converter ships an update every 6 days, The Conversion App every 5 weeks. The most recent releases landed on September 29, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Unit Converter | The Conversion App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.5K ratings)](https://appshunter.io/ios/app/unit-converter-milas-tools/id403110615/reviews)** | [4.1 (60 ratings)](https://appshunter.io/ios/app/the-conversion-app/id1507894827/reviews) |
| Number of ratings | **1.5K** | 60 |
| Positive reviews | **87.5% of reviews** | 45.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 13 MB | 17 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Scott DeSapio](https://appshunter.io/developer/403110618) | [Sparrow Development LLC](https://appshunter.io/developer/1291798088) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-milas-tools/id403110615)

This app offers a comprehensive unit conversion tool with over 300 units across 27 categories. It supports compound units, date calculations, and conversions between various number systems, including historical units. The interface is designed for ease of use with smart keyboards and customizable display options.

**Highlights:** 27 conversion categories, 300+ units, Compound unit support, Date calculator, Fractions and number conversions, Historical units, Customizable interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mila's Tools PRO Monthly | $0.99 | per month |
| Mila's Tools PRO Yearly | $6.99 | per year |
| Mila's Tools PRO Lifetime | $9.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Quick and accurate conversions
- 💡 Comprehensive list of units
- 🔍 Convenient for everyday use
- ⭐ Reliable and consistent

**What reviewers complain about**

- 🐛 Scrolling issues on newer devices
- 🔍 Limited customization options
- 💰 Desire for free version to remain free

**Reported bugs**

- Crashes or freezes on some devices
- Conversion results not displaying properly

**Requested features**

- Ability to customize order of conversion units
- Addition of more specialized units (e.g. astronomical distances)
- Improved scrolling functionality on all devices


### The Conversion App

[App page](https://appshunter.io/ios/app/the-conversion-app/id1507894827)

This utility app offers a simple and powerful way to perform various unit conversions. It supports a wide range of categories and allows users to request new conversions to be added. Available on iPhone and iPad, it's designed for ease of use.

**Highlights:** Area conversion, Data conversion, Length conversion, Speed conversion, Time conversion, Volume conversion, Weight conversion

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter free?

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

### Is The Conversion App free?

The Conversion App is free to download, with no in-app purchases.

### Which has better reviews, Unit Converter or The Conversion App?

Unit Converter is rated higher. Unit Converter averages 4.8 out of 5 from 1.5K ratings, while The Conversion App averages 4.1 from 60 ratings.

### Do Unit Converter or The Conversion App have ads?

Unit Converter shows ads; The Conversion App does not.

### Which is updated more often, Unit Converter or The Conversion App?

Unit Converter ships an update every 6 days, and The Conversion App every 5 weeks. Most recently, Unit Converter was updated on September 29, 2026 and The Conversion App on September 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.*