# Conversion Calculator Units vs The Conversion App

The clearest difference is rating: Conversion Calculator Units at 4.7 against The Conversion App's 4.1. Conversion Calculator Units also leads on review sentiment (82% vs 45%) and ratings volume (5K vs 60). The Conversion App's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Conversion Calculator Units sells 1 one-off in-app purchase. The Conversion App asks for nothing beyond the download.

Conversion Calculator Units holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 60, so its average is the more settled of the two. Written reviews point the same way: 82% of Conversion Calculator Units's written reviews are positive against 45% of The Conversion App's.

Conversion Calculator Units ships an update every 2 months, The Conversion App every 5 weeks. The most recent releases landed on September 28, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Units | The Conversion App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews)** | [4.1 (60 ratings)](https://appshunter.io/ios/app/the-conversion-app/id1507894827/reviews) |
| Number of ratings | **5K** | 60 |
| Positive reviews | **82.1% of reviews** | 45.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 17 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RV AppStudios LLC](https://appshunter.io/developer/340181308) | [Sparrow Development LLC](https://appshunter.io/developer/1291798088) |

## What reviewers say

### Conversion Calculator Units

[App page](https://appshunter.io/ios/app/conversion-calculator-units/id727632233)

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

**Highlights:** Converts over 140 units, Supports 12 conversion categories, Customizable themes, Drag and set unit positions, Add units to favorites, Share converted units via email

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |

**What reviewers like**

- 👍 User-friendly
- 🚀 Easy to use
- 💡 Helpful for learning metric system
- 👍 Great for conversions
- 👍 Intuitive interface

**What reviewers complain about**

- 🐛 Ads disrupt usage
- 🐛 Difficult to change units
- 🐛 Lacks portrait mode
- 🐛 Upside-down orientation issues
- 🐛 Cluttered UI design

**Reported bugs**

- Ads not removed after purchase
- Incorrect unit conversions

**Requested features**

- Add pressure conversion units
- Include a basic calculator function
- Implement multi-language support
- Allow customization of unit order


### 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 Conversion Calculator Units free?

Conversion Calculator Units 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, Conversion Calculator Units or The Conversion App?

Conversion Calculator Units is rated higher. Conversion Calculator Units averages 4.7 out of 5 from 5K ratings, while The Conversion App averages 4.1 from 60 ratings.

### Do Conversion Calculator Units or The Conversion App have ads?

Conversion Calculator Units shows ads; The Conversion App does not.

### Which is updated more often, Conversion Calculator Units or The Conversion App?

Conversion Calculator Units ships an update every 2 months, and The Conversion App every 5 weeks. Most recently, Conversion Calculator Units was updated on September 28, 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.*