# Units Converter+ vs Unit Converter Engineering Pro

The clearest difference is in-app purchases: Units Converter+ at none against Unit Converter Engineering Pro's 2. Units Converter+ also leads on iOS requirement (10.0 vs 13.0). Unit Converter Engineering Pro's advantage is update cadence (weekly vs monthly). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Unit Converter Engineering Pro sells 2 in-app purchases, starting at $5.99 per 7 days. Units Converter+ asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Units Converter+ against 5.0 for Unit Converter Engineering Pro. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Units Converter+ ships an update monthly, Unit Converter Engineering Pro weekly. The most recent releases landed on September 21, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Units Converter+ | Unit Converter Engineering Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/units-converter-plus/id895360448/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/unit-converter-engineering-pro/id6757166485/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 77 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fusion Software Development Pty Ltd](https://appshunter.io/developer/872570075) | [Kaiguri Tech](https://appshunter.io/developer/1864995084) |

## What reviewers say

### Units Converter+

[App page](https://appshunter.io/ios/app/units-converter-plus/id895360448)

This free utility tool helps you convert between over 400 units across more than 20 categories. It features a simple interface, fast calculations, and automatic updates for currency exchange rates.

**Highlights:** Over 400 units, 20+ conversion categories, Simple and easy UI, Fast calculations, Latest currency rates, Automatic currency updates, Mixed-unit support

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Converter Engineering Pro

[App page](https://appshunter.io/ios/app/unit-converter-engineering-pro/id6757166485)

This app provides precise unit conversions for engineers, scientists, and students. It supports over 100 units across 35 categories, including scientific notation and 9-digit decimal precision. The tool works offline and adheres to SI, NIST, and ISO standards.

**Highlights:** Over 100 units in 35+ categories, Scientific notation support, 9-digit decimal precision, SI, NIST, ISO compliant, Offline functionality, Specialized units included

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-Day Trial | $5.99 | per 7 days |
| Yearly Plan | $19.99 | per year |


## Frequently asked questions

### Is Units Converter+ free?

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

### Is Unit Converter Engineering Pro free?

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

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

Units Converter+ and Unit Converter Engineering Pro are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Units Converter+ or Unit Converter Engineering Pro have ads?

Neither Units Converter+ nor Unit Converter Engineering Pro shows ads.

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

Units Converter+ ships an update monthly, and Unit Converter Engineering Pro weekly. Most recently, Units Converter+ was updated on September 21, 2026 and Unit Converter Engineering Pro on October 2, 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.*