# Units vs Unit Converter

The clearest difference is rating: Unit Converter at 4.8 against Units's 4.1. Unit Converter also leads on review sentiment (88% vs 60%) and update cadence (weekly vs monthly). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Units sells 3 one-off in-app purchases and Unit Converter sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Unit Converter holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: Unit Converter has 1.5K ratings behind it against 51, 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 88% of Unit Converter's.

Units ships an update monthly, Unit Converter weekly. Both last shipped on November 6, 2026.

## The numbers

| Metric | Units | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (51 ratings)](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017/reviews) | **[4.8 (1.5K ratings)](https://appshunter.io/ios/app/unit-converter-milas-tools/id403110615/reviews)** |
| Number of ratings | 51 | **1.5K** |
| Positive reviews | 60.1% of reviews | **87.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 86 MB | 13 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Homegrown Software Ltd](https://appshunter.io/developer/406645730) | [Scott DeSapio](https://appshunter.io/developer/403110618) |

## 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


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-milas-tools/id403110615)

This app offers a comprehensive unit conversion tool with over 300 units across 27 categories. It supports compound units, date calculations, and conversions between various number systems, including historical units. The interface is designed for ease of use with smart keyboards and customizable display options.

**Highlights:** 27 conversion categories, 300+ units, Compound unit support, Date calculator, Fractions and number conversions, Historical units, Customizable interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mila's Tools PRO Monthly | $0.99 | per month |
| Mila's Tools PRO Yearly | $4.99 | per year |
| Mila's Tools PRO Lifetime | $9.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Quick and accurate conversions
- 💡 Comprehensive list of units
- 🔍 Convenient for everyday use
- ⭐ Reliable and consistent

**What reviewers complain about**

- 🐛 Scrolling issues on newer devices
- 🔍 Limited customization options
- 💰 Desire for free version to remain free

**Reported bugs**

- Crashes or freezes on some devices
- Conversion results not displaying properly

**Requested features**

- Ability to customize order of conversion units
- Addition of more specialized units (e.g. astronomical distances)
- Improved scrolling functionality on all devices


## Frequently asked questions

### Is Units free?

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

### Is Unit Converter free?

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

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

Unit Converter is rated higher. Units averages 4.1 out of 5 from 51 ratings, while Unit Converter averages 4.8 from 1.5K ratings.

### Do Units or Unit Converter have ads?

Both Units and Unit Converter show ads.

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

Units ships an update monthly, and Unit Converter weekly. Most recently, Units was updated on November 6, 2026 and Unit Converter on November 6, 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.*