# Unit Converter Pro HD. vs ByeIdiom

The clearest difference is price: ByeIdiom at Free against Unit Converter Pro HD.'s $0.99. ByeIdiom also leads on update cadence (fortnightly vs every 2 months). Unit Converter Pro HD.'s advantage is in-app purchases (none vs 2) and ads (none vs shown).

ByeIdiom is free to download; Unit Converter Pro HD. costs $0.99 up front. ByeIdiom sells 2 one-off in-app purchases. Unit Converter Pro HD. asks for nothing beyond the download.

Unit Converter Pro HD. ships an update every 2 months, ByeIdiom fortnightly. The most recent releases landed on September 26, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Unit Converter Pro HD. | ByeIdiom |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.6 (187 ratings)](https://appshunter.io/ios/app/unit-converter-pro-hd/id458584668/reviews)** | — |
| Number of ratings | **187** | — |
| Positive reviews | 86.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 13 MB | 36 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [良峰 侯](https://appshunter.io/developer/654444245) | [德明 杨](https://appshunter.io/developer/1630281265) |

## What reviewers say

### Unit Converter Pro HD.

[App page](https://appshunter.io/ios/app/unit-converter-pro-hd/id458584668)

Easily convert between over 700 units of measure across 30 categories. This powerful tool acts as a universal assistant for all your conversion needs, saving you time and effort.

**Highlights:** 30 conversion categories, Over 700 units of measure, Backspace key for corrections, Intuitive and easy to use, Supports Dark Mode

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and efficient
- 👍 Easy to use
- 👍 Comprehensive unit conversions
- 👍 Accurate calculations
- 👍 Handy and useful

**What reviewers complain about**

- 🐛 Missing some important units
- 🔍 Difficult to navigate and find desired units
- 🔍 Cluttered interface with too many options
- 🔋 High battery consumption

**Reported bugs**

- Incorrect fuel consumption conversions
- Conversion values disappearing after update

**Requested features**

- Add support for more units (e.g. knots, stone, electron volts)
- Improve navigation and make it easier to find desired units
- Add portrait mode support
- Optimize interface for better usability


### ByeIdiom

[App page](https://appshunter.io/ios/app/byeidiom/id1668659209)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Pro Version | $0.99 | one-time |
| Donate | $0.99 | one-time |


## Frequently asked questions

### Is Unit Converter Pro HD. free?

Unit Converter Pro HD. costs $0.99, with no in-app purchases.

### Is ByeIdiom free?

ByeIdiom is free to download, with in-app purchases available.

### Do Unit Converter Pro HD. or ByeIdiom have ads?

ByeIdiom shows ads; Unit Converter Pro HD. does not.

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

Unit Converter Pro HD. ships an update every 2 months, and ByeIdiom fortnightly. Most recently, Unit Converter Pro HD. was updated on September 26, 2026 and ByeIdiom on September 15, 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.*