# Engineer's Unit Converter vs convertX

The clearest difference is iOS requirement: convertX at 13.0 against Engineer's Unit Converter's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Engineer's Unit Converter sells 1 one-off in-app purchase and convertX sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Engineer's Unit Converter | convertX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | — |
| Size | 7 MB | 32 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jose Gerardo Palma Duran](https://appshunter.io/developer/1873843788) | [Dhaval Panasara](https://appshunter.io/developer/1753452519) |

## What reviewers say

### Engineer's Unit Converter

[App page](https://appshunter.io/ios/app/engineers-unit-converter/id6758744042)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### convertX

[App page](https://appshunter.io/ios/app/convertx-unit-converter/id6760885403)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LifeTime Premium | $4.99 | one-time |


## Frequently asked questions

### Is Engineer's Unit Converter free?

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

### Is convertX free?

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

### Do Engineer's Unit Converter or convertX have ads?

Both Engineer's Unit Converter and convertX show ads.

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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.*