# Unit Converter HD. vs Radiantek CO2

The clearest difference is in-app purchases: Radiantek CO2 at none against Unit Converter HD.'s 1. Unit Converter HD.'s advantage is device support and iOS requirement (13.0 vs 15.0). On price there is nothing between them.

Both are free to download. Unit Converter HD. sells 1 one-off in-app purchase. Radiantek CO2 asks for nothing beyond the download.

## The numbers

| Metric | Unit Converter HD. | Radiantek CO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (645 ratings)](https://appshunter.io/ios/app/unit-converter-hd/id481973377/reviews)** | — |
| Number of ratings | **645** | — |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 86 MB | 1 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [RADIANT INNOVATION INC.](https://appshunter.io/developer/924300240) |

## 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


### Radiantek CO2

[App page](https://appshunter.io/ios/app/radiantek-co2/id6464472532)

**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 Radiantek CO2 free?

Radiantek CO2 is free to download, with no in-app purchases.

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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.*