# Conversion Calculator Units vs Basic Unit Converter

The clearest difference is rating: Conversion Calculator Units at 4.7 against Basic Unit Converter's 4.0. Conversion Calculator Units also leads on ratings volume (5K vs 2). Basic Unit Converter's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

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

Conversion Calculator Units holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 82% of Conversion Calculator Units's written reviews are positive against 100% of Basic Unit Converter's, so the app with the better star average is not the one people write more warmly about.

Conversion Calculator Units ships an update every 2 months, Basic Unit Converter every 2 weeks. The most recent releases landed on October 6, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Units | Basic Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/basic-unit-converter/id1547306354/reviews) |
| Number of ratings | **5K** | 2 |
| Positive reviews | 82.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 84 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RV AppStudios LLC](https://appshunter.io/developer/340181308) | [Double Theory Ltd](https://appshunter.io/developer/1525279410) |

## 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


### Basic Unit Converter

[App page](https://appshunter.io/ios/app/basic-unit-converter/id1547306354)

Easily convert between various units of measurement across 12 categories including length, mass, temperature, and digital storage. Ideal for cooking, personal measurements, or general calculations.

**Highlights:** 12 conversion categories, Supports metric and imperial units, Instant calculation, Intuitive interface, Wide range of units

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

**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 Basic Unit Converter free?

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

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

Conversion Calculator Units is rated higher. Conversion Calculator Units averages 4.7 out of 5 from 5K ratings, while Basic Unit Converter averages 4.0 from 2 ratings.

### Do Conversion Calculator Units or Basic Unit Converter have ads?

Conversion Calculator Units shows ads; Basic Unit Converter does not.

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

Conversion Calculator Units ships an update every 2 months, and Basic Unit Converter every 2 weeks. Most recently, Conversion Calculator Units was updated on October 6, 2026 and Basic Unit Converter on September 19, 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.*