# Unit Converter HD. vs US Unit Converter

Unit Converter HD. and US Unit Converter both sit at 4.7 stars, but that hides the real split: 94% of Unit Converter HD.'s written reviews are positive against 44% of US Unit Converter's. Unit Converter HD. also leads on update cadence (every 2 months vs every 6 months) and ratings volume (644 vs 110). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Unit Converter HD. sells 1 one-off in-app purchase and US Unit Converter 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 4.8 for US Unit Converter. That said, the two scores are not equally well evidenced: Unit Converter HD. has 644 ratings behind it against 110, 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 44% of US Unit Converter's.

Unit Converter HD. ships an update every 2 months, US Unit Converter every 6 months. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Unit Converter HD. | US Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (644 ratings)](https://appshunter.io/ios/app/unit-converter-hd/id481973377/reviews) | **[4.8 (110 ratings)](https://appshunter.io/ios/app/us-unit-converter/id1577905442/reviews)** |
| Number of ratings | **644** | 110 |
| Positive reviews | **93.8% of reviews** | 44.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 86 MB | 6 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [Kei Suefuji](https://appshunter.io/developer/1388335881) |

## 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


### US Unit Converter

[App page](https://appshunter.io/ios/app/us-unit-converter/id1577905442)

Easily convert between US customary units and the International System of Units for various measurements like length, weight, area, volume, and temperature. Access conversion history and remove ads with a premium upgrade.

**Highlights:** Length conversion, Weight conversion, Area conversion, Liquid volume conversion, Temperature conversion, Conversion history, Ad-free option

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM | $3.99 | one-time |


## Frequently asked questions

### Is Unit Converter HD. free?

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

### Is US Unit Converter free?

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

### Which has better reviews, Unit Converter HD. or US Unit Converter?

US Unit Converter is rated higher. Unit Converter HD. averages 4.7 out of 5 from 644 ratings, while US Unit Converter averages 4.8 from 110 ratings.

### Do Unit Converter HD. or US Unit Converter have ads?

Both Unit Converter HD. and US Unit Converter show ads.

### Which is updated more often, Unit Converter HD. or US Unit Converter?

Unit Converter HD. ships an update every 2 months, and US Unit Converter every 6 months. Most recently, Unit Converter HD. was updated on October 20, 2026 and US Unit Converter on October 25, 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.*