# Unit Converter HD. vs Conversion Calculator Units

Unit Converter HD. and Conversion Calculator Units both sit at 4.7 stars, but that hides the real split: 94% of Unit Converter HD.'s written reviews are positive against 82% of Conversion Calculator Units's. Unit Converter HD. also leads on iOS requirement (13.0 vs 15.0). Conversion Calculator Units's advantage is ratings volume (5K vs 644). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Unit Converter HD. sells 1 one-off in-app purchase and Conversion Calculator Units sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Unit Converter HD. against 4.7 for Conversion Calculator Units. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 644, so its average is the more settled of the two. Written reviews are what separate them: 94% of Unit Converter HD.'s written reviews are positive against 82% of Conversion Calculator Units's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 29, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Unit Converter HD. | Conversion Calculator Units |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (644 ratings)](https://appshunter.io/ios/app/unit-converter-hd/id481973377/reviews) | [4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews) |
| Number of ratings | 644 | **5K** |
| Positive reviews | **93.8% of reviews** | 82.1% 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 | 86 MB | 41 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [RV AppStudios LLC](https://appshunter.io/developer/340181308) |

## What reviewers say

### Unit Converter HD.

[App page](https://appshunter.io/ios/app/unit-converter-hd/id481973377)

Easily convert over 700 units across 30 categories with this powerful tool. It offers a user-friendly interface, dark mode support, and a backspace key for quick corrections. Save time on all your measurement conversion needs.

**Highlights:** 700+ Units of Measure, 30 Conversion Categories, Easy-to-Use Interface, Dark Mode Support, Backspace Key

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

**In-app purchases (1)**

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

**What reviewers like**

- 👍 Easy to use
- 🚀 Handy and convenient
- 💡 Comprehensive set of conversions
- 🚀 Very useful app
- 👍 Intuitive design

**What reviewers complain about**

- 🐛 Occasional crashes or freezing issues
- 💡 Could be more intuitive for some users
- 🔒 Requires horizontal orientation

**Reported bugs**

- Freezing or crashing on some devices
- Display issues with certain units

**Requested features**

- Add support for US weights (tons, lbs., oz.)
- Implement portrait mode support
- Provide more customization options


### 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


## Frequently asked questions

### Is Unit Converter HD. free?

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

### Is Conversion Calculator Units free?

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

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

Unit Converter HD. and Conversion Calculator Units are both rated 4.7 out of 5 on the App Store, from 644 and 5K ratings respectively.

### Do Unit Converter HD. or Conversion Calculator Units have ads?

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

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

Unit Converter HD. ships an update every 2 months, and Conversion Calculator Units every 2 months. Most recently, Unit Converter HD. was updated on September 29, 2026 and Conversion Calculator Units on October 13, 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.*