# Units vs Units Plus Converter

The clearest difference is price: Units at Free against Units Plus Converter's $19.99. Units Plus Converter's advantage is rating (4.9 vs 4.1) and in-app purchases (none vs 3). On update cadence and device support there is nothing between them.

Units is free to download; Units Plus Converter costs $19.99 up front. Units sells 3 one-off in-app purchases. Units Plus Converter asks for nothing beyond the download.

Units Plus Converter holds the better App Store score, 4.9 against 4.1. That said, the two scores are not equally well evidenced: Units Plus Converter has 8.4K ratings behind it against 50, so its average is the more settled of the two. Written reviews point the same way: 60% of Units's written reviews are positive against 91% of Units Plus Converter's.

Units ships an update monthly, Units Plus Converter every 5 weeks. Both last shipped on October 26, 2026.

## The numbers

| Metric | Units | Units Plus Converter |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | [4.1 (50 ratings)](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017/reviews) | **[4.9 (8.4K ratings)](https://appshunter.io/ios/app/units-plus-converter/id593306620/reviews)** |
| Number of ratings | 50 | **8.4K** |
| Positive reviews | 60.0% of reviews | **91.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 86 MB | 7 MB |
| Requires iOS | 17.0 | **8.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Homegrown Software Ltd](https://appshunter.io/developer/406645730) | [Alan Mrvica](https://appshunter.io/developer/593306623) |

## What reviewers say

### Units

[App page](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017)

Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.

**Highlights:** Hundreds of units across 43 categories, Daily updated currency exchange rates, Hide unused units, Reorder units and categories, Universal app support (iPhone, iPod touch, iPad)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |

**What reviewers like**

- 🚀 Efficient and fast conversions
- 👍 Comprehensive list of units
- 🔍 Customizable unit selection
- 💰 Free app with optional paid version
- 🔧 Useful for engineering and technical work

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🕰️ Outdated currency conversion rates
- 🔍 Too many unit categories, hard to navigate
- 💰 Ads in free version
- 📏 Ruler feature not accurate on some devices

**Reported bugs**

- Crashes when clearing input fields
- Numerical keypad covers conversion results
- Incompatibility issues with newer iOS versions
- Ruler measurements not accurate on all devices

**Requested features**

- Add nautical units (miles, knots)
- Improve currency conversion accuracy and updates
- Allow customization of visible unit categories
- Add more clothing/shoe size conversions
- Improve user interface and search functionality


### Units Plus Converter

[App page](https://appshunter.io/ios/app/units-plus-converter/id593306620)

Easily convert between various units and currencies with a simple, intuitive interface. Features live currency updates for 155 world currencies, refreshed every 15 minutes. Optimized for a wide range of Apple devices, including iPads with Split View support.

**Highlights:** Unit conversion across 12 categories, Live currency updates for 155 currencies, Optimized for iPhone and iPad, iPad Split View support, Data-computer data conversion, Fuel-mileage conversion

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Convenient and reliable
- 💰 Worth the purchase
- 🌍 Helpful for travel and international use
- 📊 Comprehensive range of conversions

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔢 Limited unit options in some categories
- 🔍 Unintuitive interface for certain conversions
- 💰 Overpriced for the features offered

**Reported bugs**

- Decimal input not working
- Currency conversion not updating properly
- App crashing on certain devices

**Requested features**

- Add feet and inches conversion option
- Include kilojoules to calories conversion
- Improve currency conversion accuracy
- Add time zone conversion feature
- Provide more advanced unit options (e.g. torque, density)


## Frequently asked questions

### Is Units free?

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

### Is Units Plus Converter free?

Units Plus Converter costs $19.99, with no in-app purchases.

### Which has better reviews, Units or Units Plus Converter?

Units Plus Converter is rated higher. Units averages 4.1 out of 5 from 50 ratings, while Units Plus Converter averages 4.9 from 8.4K ratings.

### Do Units or Units Plus Converter have ads?

Units shows ads; Units Plus Converter does not.

### Which is updated more often, Units or Units Plus Converter?

Units ships an update monthly, and Units Plus Converter every 5 weeks. Most recently, Units was updated on October 26, 2026 and Units Plus Converter on October 26, 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.*