# Engineering Converter vs Unit Converter

The clearest difference is in-app purchases: Engineering Converter at none against Unit Converter's 2. Unit Converter's advantage is update cadence (every 9 days vs every 42 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Unit Converter sells 2 in-app purchases, starting at $0.99 per month. Engineering Converter asks for nothing beyond the download.

Engineering Converter ships an update every 42 months, Unit Converter every 9 days. The most recent releases landed on October 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Engineering Converter | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/unit-converter-best-unit-app/id6450140068/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 42 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 10 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brook Wallace](https://appshunter.io/developer/1234097174) | [Ankur Kalkani](https://appshunter.io/developer/1684873234) |

## What reviewers say

### Engineering Converter

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-best-unit-app/id6450140068)

This app offers a comprehensive suite of conversion tools for various units and currencies. It simplifies complex calculations across physical dimensions, mass, time, energy, electricity, and more. Ideal for students and professionals needing precise measurements.

**Highlights:** Currency conversion, Physical dimension conversion, Mass, weight, and force conversion, Time and motion conversion, Energy, heat, and light conversion, Electricity conversion, Data storage conversion

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $0.99 | per year |


## Frequently asked questions

### Is Engineering Converter free?

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

### Is Unit Converter free?

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

### Do Engineering Converter or Unit Converter have ads?

Both Engineering Converter and Unit Converter show ads.

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

Engineering Converter ships an update every 42 months, and Unit Converter every 9 days. Most recently, Engineering Converter was updated on October 16, 2026 and Unit Converter on September 29, 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.*