# Units Converter for Engineers vs CONVERT UNITS

The clearest difference is rating: CONVERT UNITS at 4.7 against Units Converter for Engineers's 3.0. CONVERT UNITS also leads on review sentiment (76% vs 50%) and ratings volume (1.4K vs 2). Units Converter for Engineers's advantage is ads (none vs shown). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Units Converter for Engineers sells 2 one-off in-app purchases and CONVERT UNITS sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

CONVERT UNITS holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: CONVERT UNITS has 1.4K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Units Converter for Engineers's written reviews are positive against 76% of CONVERT UNITS's.

Units Converter for Engineers ships an update every 5 weeks, CONVERT UNITS every 9 days. The most recent releases landed on September 19, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Units Converter for Engineers | CONVERT UNITS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/units-converter-for-engineers/id1018604081/reviews) | **[4.7 (1.4K ratings)](https://appshunter.io/ios/app/convert-units/id1114969241/reviews)** |
| Number of ratings | 2 | **1.4K** |
| Positive reviews | 50.0% of reviews | **75.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 5 MB | 22 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lucy Enterprises](https://appshunter.io/developer/1656612108) | [Adysseus](https://appshunter.io/developer/447444997) |

## What reviewers say

### Units Converter for Engineers

[App page](https://appshunter.io/ios/app/units-converter-for-engineers/id1018604081)

This tool allows professionals and students to convert units and currencies using dimensional analysis. It supports a vast number of unit combinations and includes physical constants. Currency rates are updated monthly.

**Highlights:** Free-form unit conversion via dimensional analysis, Supports over 300 single units, Supports over 165 currencies with automatic updates, Includes dozens of physical constants, Identifies unit mismatches, Glossary of available units

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $0.99 | one-time |
| Remove ads | $1.99 | one-time |


### CONVERT UNITS

[App page](https://appshunter.io/ios/app/convert-units/id1114969241)

Easily convert between various units of measurement including length, weight, temperature, and currency. Features automatic currency updates, a vast selection of currencies, and customizable display options for accuracy and rounding. Optimized for multitasking on iPad and offers a beautiful dark design.

**Highlights:** Converts length, weight, speed, area, time, pressure, volume, power, fuel, temperature, data, and currency, Automatic currency updates, 160 currencies available, Multitasking enabled for iPad, Alphabetical quick links for units, Customizable startup categories, Adjustable accuracy and rounding

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | per month |
| Remove ads | $19.99 | one-time |

**What reviewers like**

- 👍 Quick & easy to use
- 👍 Ease of use
- 👍 Simple and easy to use
- 👍 Well thought out and easy to use
- 👍 Excellent and very reliable

**What reviewers complain about**

- 🐛 Ads obstruct use
- 🐛 Subscription required to remove ads
- 🐛 Currency conversion not working

**Reported bugs**

- App got stuck, required uninstall/reinstall to fix
- Navigation issues, unable to get back to home page

**Requested features**

- Option to convert between functions (length to volume)
- Remember last conversion settings for each category


## Frequently asked questions

### Is Units Converter for Engineers free?

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

### Is CONVERT UNITS free?

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

### Which has better reviews, Units Converter for Engineers or CONVERT UNITS?

CONVERT UNITS is rated higher. Units Converter for Engineers averages 3.0 out of 5 from 2 ratings, while CONVERT UNITS averages 4.7 from 1.4K ratings.

### Do Units Converter for Engineers or CONVERT UNITS have ads?

CONVERT UNITS shows ads; Units Converter for Engineers does not.

### Which is updated more often, Units Converter for Engineers or CONVERT UNITS?

Units Converter for Engineers ships an update every 5 weeks, and CONVERT UNITS every 9 days. Most recently, Units Converter for Engineers was updated on September 19, 2026 and CONVERT UNITS 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.*