# Unit Converter ++ vs Unit Converter Calculator Pro

The clearest difference is review sentiment: Unit Converter Calculator Pro at 76% against Unit Converter ++'s 20%. Unit Converter Calculator Pro also leads on rating (4.7 vs 1.6) and update cadence (monthly vs every 9 months). Unit Converter ++'s advantage is in-app purchases (none vs 4) and iOS requirement (11.0 vs 13.0). On price and ads there is nothing between them.

Both are free to download. Unit Converter Calculator Pro sells 4 one-off in-app purchases. Unit Converter ++ asks for nothing beyond the download.

Unit Converter Calculator Pro holds the better App Store score, 4.7 against 1.6. That said, the two scores are not equally well evidenced: Unit Converter Calculator Pro has 993 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 20% of Unit Converter ++'s written reviews are positive against 76% of Unit Converter Calculator Pro's.

Unit Converter ++ ships an update every 9 months, Unit Converter Calculator Pro monthly. The most recent releases landed on October 9, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Unit Converter ++ | Unit Converter Calculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (10 ratings)](https://appshunter.io/ios/app/unit-converter-plus-plus/id911329028/reviews) | **[4.7 (993 ratings)](https://appshunter.io/ios/app/unit-converter-calculator-pro/id1343845631/reviews)** |
| Number of ratings | 10 | **993** |
| Positive reviews | 20.0% of reviews | **76.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 6 MB | 37 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Nirav Patel](https://appshunter.io/developer/787086013) | [Rome Rock LLC](https://appshunter.io/developer/1190244007) |

## What reviewers say

### 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


### Unit Converter Calculator Pro

[App page](https://appshunter.io/ios/app/unit-converter-calculator-pro/id1343845631)

Easily convert between metric and imperial units for a wide range of measurements including area, speed, temperature, and weight. Supports scientific prefixes and offers a history of your conversions. No internet connection required.

**Highlights:** Metric to Imperial unit conversion, Imperial to Metric unit conversion, Area, speed, temperature, volume, weight conversions, Scientific prefixes support, Conversion history, Offline functionality

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads & Unlock Themes | $2.99 | one-time |
| Remove Ads & Unlock Themes 1 | $4.99 | one-time |
| Remove Ads & Unlock Themes 2 | $6.99 | one-time |
| Remove Ads & Unlock Themes 3 | $9.99 | one-time |

**What reviewers like**

- 🚀 Easy & accurate
- 🚀 Excellent Tool
- 👍 Goog for social
- 👍 Excelente para mi trabajo
- 👍 Sencillez

**What reviewers complain about**

- 👎 Hard to use interface
- 👎 Lacks pressure units
- 👎 No reverse button
- 👎 Metric to imperial format not user-friendly

**Reported bugs**

- 🐛 Changing to something else

**Requested features**

- 💡 Favorite conversations
- 💡 Color-coded sections
- 💡 Money conversion


## Frequently asked questions

### Is Unit Converter ++ free?

Unit Converter ++ is free to download, with no in-app purchases.

### Is Unit Converter Calculator Pro free?

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

### Which has better reviews, Unit Converter ++ or Unit Converter Calculator Pro?

Unit Converter Calculator Pro is rated higher. Unit Converter ++ averages 1.6 out of 5 from 10 ratings, while Unit Converter Calculator Pro averages 4.7 from 993 ratings.

### Do Unit Converter ++ or Unit Converter Calculator Pro have ads?

Both Unit Converter ++ and Unit Converter Calculator Pro show ads.

### Which is updated more often, Unit Converter ++ or Unit Converter Calculator Pro?

Unit Converter ++ ships an update every 9 months, and Unit Converter Calculator Pro monthly. Most recently, Unit Converter ++ was updated on October 9, 2026 and Unit Converter Calculator Pro 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.*