# Unit Converter HD. vs Unit Converter ++

The clearest difference is review sentiment: Unit Converter HD. at 94% against Unit Converter ++'s 20%. Unit Converter HD. also leads on rating (4.7 vs 1.6) and ratings volume (644 vs 10). Unit Converter ++'s advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Unit Converter HD. sells 1 one-off in-app purchase. Unit Converter ++ asks for nothing beyond the download.

Unit Converter HD. holds the better App Store score, 4.7 against 1.6. That said, the two scores are not equally well evidenced: Unit Converter HD. has 644 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 94% of Unit Converter HD.'s written reviews are positive against 20% of Unit Converter ++'s.

Unit Converter HD. ships an update every 2 months, Unit Converter ++ every 9 months. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Unit Converter HD. | Unit Converter ++ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (644 ratings)](https://appshunter.io/ios/app/unit-converter-hd/id481973377/reviews)** | [1.6 (10 ratings)](https://appshunter.io/ios/app/unit-converter-plus-plus/id911329028/reviews) |
| Number of ratings | **644** | 10 |
| Positive reviews | **93.8% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 9 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 86 MB | 6 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [Nirav Patel](https://appshunter.io/developer/787086013) |

## 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


### Unit Converter ++

[App page](https://appshunter.io/ios/app/unit-converter-plus-plus/id911329028)

Easily convert between various units of measurement for length, weight, temperature, volume, and more. This offline tool is designed for travelers, students, and professionals needing quick conversions.

**Highlights:** Converts length, weight, temperature, volume, and more, Supports numerous units of measurement, Works offline, Useful for travelers, students, and professionals, Covers speed, area, pressure, power, and energy units

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

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter HD. free?

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

### Is Unit Converter ++ free?

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

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

Unit Converter HD. is rated higher. Unit Converter HD. averages 4.7 out of 5 from 644 ratings, while Unit Converter ++ averages 1.6 from 10 ratings.

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

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

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

Unit Converter HD. ships an update every 2 months, and Unit Converter ++ every 9 months. Most recently, Unit Converter HD. was updated on September 29, 2026 and Unit Converter ++ on October 4, 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.*