# The Conversion App vs Unit Converter

The clearest difference is review sentiment: Unit Converter at 100% against The Conversion App's 45%. Unit Converter also leads on rating (5.0 vs 4.1). The Conversion App's advantage is ads (none vs shown) and ratings volume (61 vs 3). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Unit Converter holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: The Conversion App has 61 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 45% of The Conversion App's written reviews are positive against 100% of Unit Converter's.

Both ship on a similar rhythm, roughly every 5 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | The Conversion App | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (61 ratings)](https://appshunter.io/ios/app/the-conversion-app/id1507894827/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/unit-converter-14-in-1/id1587655048/reviews)** |
| Number of ratings | **61** | 3 |
| Positive reviews | 45.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 17 MB | 10 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sparrow Development LLC](https://appshunter.io/developer/1291798088) | [Noadit, Inc.](https://appshunter.io/developer/1516754355) |

## What reviewers say

### 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


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-14-in-1/id1587655048)

This tool provides fast and accurate conversions across 14 common physical unit categories. It supports metric, imperial, and traditional Chinese units, with customizable display styles for personalized use. Ideal for everyday and professional conversion needs.

**Highlights:** 14 unit categories, Metric, imperial, and Chinese units, Customizable display styles, Accurate conversions, Supports length, area, volume, mass, temperature, and more

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

**In-app purchases:** none


## Frequently asked questions

### Is The Conversion App free?

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

### Is Unit Converter free?

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

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

Unit Converter is rated higher. The Conversion App averages 4.1 out of 5 from 61 ratings, while Unit Converter averages 5.0 from 3 ratings.

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

Unit Converter shows ads; The Conversion App does not.

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

The Conversion App ships an update every 5 weeks, and Unit Converter every 5 weeks. Most recently, The Conversion App was updated on November 3, 2026 and Unit Converter on November 3, 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.*