# Units Converter for Engineers vs Engineering Converter

The clearest difference is in-app purchases: Engineering Converter at none against Units Converter for Engineers's 2. Engineering Converter also leads on device support (3 vs 1). Units Converter for Engineers's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 42 months). On price and iOS requirement there is nothing between them.

Both are free to download. Units Converter for Engineers sells 2 one-off in-app purchases. Engineering Converter asks for nothing beyond the download.

Units Converter for Engineers ships an update every 5 weeks, Engineering Converter every 42 months. The most recent releases landed on September 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Units Converter for Engineers | Engineering Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/units-converter-for-engineers/id1018604081/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 42 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 6 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lucy Enterprises](https://appshunter.io/developer/1656612108) | [Brook Wallace](https://appshunter.io/developer/1234097174) |

## 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 |


### Engineering Converter

[App page](https://appshunter.io/ios/app/engineering-converter/id1234097175)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Units Converter for Engineers free?

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

### Is Engineering Converter free?

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

### Do Units Converter for Engineers or Engineering Converter have ads?

Engineering Converter shows ads; Units Converter for Engineers does not.

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

Units Converter for Engineers ships an update every 5 weeks, and Engineering Converter every 42 months. Most recently, Units Converter for Engineers was updated on September 19, 2026 and Engineering Converter on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*