# Conversion Calculator Units vs Unit Converter and Rates

The clearest difference is review sentiment: Conversion Calculator Units at 82% against Unit Converter and Rates's 0%. Conversion Calculator Units also leads on rating (4.7 vs 4.1) and ratings volume (5K vs 75). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Conversion Calculator Units sells 1 one-off in-app purchase and Unit Converter and Rates sells 1 in-app purchase, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.

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 75, 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 0% of Unit Converter and Rates's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Units | Unit Converter and Rates |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews)** | [4.1 (75 ratings)](https://appshunter.io/ios/app/unit-converter-and-rates/id6478766526/reviews) |
| Number of ratings | **5K** | 75 |
| Positive reviews | **82.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 41 MB | 28 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RV AppStudios LLC](https://appshunter.io/developer/340181308) | [Usman Perwaiz](https://appshunter.io/developer/1641071451) |

## 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


### Unit Converter and Rates

[App page](https://appshunter.io/ios/app/unit-converter-and-rates/id6478766526)

This app offers fast and simple unit conversions across 15 categories, including currency with live updates. Customize your experience with themes, favorite units, and adjustable decimal precision. It's designed for ease of use on iPhone and iPad.

**Highlights:** 15 conversion categories, Live currency updates, Customizable themes, Favorite units section, Adjustable decimal precision, Drag and set unit positions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Version | $2.99 | per year |


## Frequently asked questions

### Is Conversion Calculator Units free?

Conversion Calculator Units is free to download, with in-app purchases available.

### Is Unit Converter and Rates free?

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

### Which has better reviews, Conversion Calculator Units or Unit Converter and Rates?

Conversion Calculator Units is rated higher. Conversion Calculator Units averages 4.7 out of 5 from 5K ratings, while Unit Converter and Rates averages 4.1 from 75 ratings.

### Do Conversion Calculator Units or Unit Converter and Rates have ads?

Both Conversion Calculator Units and Unit Converter and Rates show ads.

### Which is updated more often, Conversion Calculator Units or Unit Converter and Rates?

Conversion Calculator Units ships an update every 2 months, and Unit Converter and Rates every 2 months. Most recently, Conversion Calculator Units was updated on November 3, 2026 and Unit Converter and Rates on October 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.*