# Units vs Unit Converter ++

The clearest difference is rating: Units at 3.6 against Unit Converter ++'s 1.6. Units also leads on review sentiment (60% vs 20%) and update cadence (monthly vs every 9 months). Unit Converter ++'s advantage is in-app purchases (none vs 3) and iOS requirement (11.0 vs 13.5). On price, ads and device support there is nothing between them.

Both are free to download. Units sells 3 one-off in-app purchases. Unit Converter ++ asks for nothing beyond the download.

Units holds the better App Store score, 3.6 against 1.6. That said, the two scores are not equally well evidenced: Units has 150 ratings behind it against 10, 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 20% of Unit Converter ++'s.

Units ships an update monthly, Unit Converter ++ every 9 months. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Units | Unit Converter ++ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (150 ratings)](https://appshunter.io/ios/app/units-pro-unit-converter/id284574017/reviews)** | [1.6 (10 ratings)](https://appshunter.io/ios/app/unit-converter-plus-plus/id911329028/reviews) |
| Number of ratings | **150** | 10 |
| Positive reviews | **60.0% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 2 MB | 6 MB |
| Requires iOS | 13.5 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Homegrown Software Ltd](https://appshunter.io/developer/406645730) | [Nirav Patel](https://appshunter.io/developer/787086013) |

## 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

**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-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 Units free?

Units 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, Units or Unit Converter ++?

Units is rated higher. Units averages 3.6 out of 5 from 150 ratings, while Unit Converter ++ averages 1.6 from 10 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 ++ every 9 months. Most recently, Units was updated on October 14, 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.*