# ADCA Tools vs Engineer's Unit Converter

The clearest difference is in-app purchases: ADCA Tools at none against Engineer's Unit Converter's 1. ADCA Tools also leads on ads (none vs shown) and update cadence (daily vs monthly). On price and device support there is nothing between them.

Both are free to download. Engineer's Unit Converter sells 1 one-off in-app purchase. ADCA Tools asks for nothing beyond the download.

ADCA Tools ships an update daily, Engineer's Unit Converter monthly. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ADCA Tools | Engineer's Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Monthly |
| Size | 28 MB | 7 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [VALSTEAM ADCA ENGINEERING, S.A.](https://appshunter.io/developer/1750422422) | [Jose Gerardo Palma Duran](https://appshunter.io/developer/1873843788) |

## What reviewers say

### ADCA Tools

[App page](https://appshunter.io/ios/app/adca-tools/id6503931944)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is ADCA Tools free?

ADCA Tools is free to download, with no in-app purchases.

### Is Engineer's Unit Converter free?

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

### Do ADCA Tools or Engineer's Unit Converter have ads?

Engineer's Unit Converter shows ads; ADCA Tools does not.

### Which is updated more often, ADCA Tools or Engineer's Unit Converter?

ADCA Tools ships an update daily, and Engineer's Unit Converter monthly. Most recently, ADCA Tools was updated on November 8, 2026 and Engineer's Unit Converter on October 31, 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.*