# Ридан Cloud vs Engineer's Unit Converter

The clearest difference is in-app purchases: Ридан Cloud at none against Engineer's Unit Converter's 1. Ридан Cloud also leads on ads (none vs shown) and iOS requirement (15.0 vs 18.0). Engineer's Unit Converter's advantage is update cadence (monthly vs every 4 months). 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. Ридан Cloud asks for nothing beyond the download.

Ридан Cloud ships an update every 4 months, Engineer's Unit Converter monthly. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Ридан Cloud | Engineer's Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Size | 63 MB | 7 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Grigoriev](https://appshunter.io/developer/1581592265) | [Jose Gerardo Palma Duran](https://appshunter.io/developer/1873843788) |

## What reviewers say

### Ридан Cloud

[App page](https://appshunter.io/ios/app/cloud-control/id6480044547)

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

**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 Ридан Cloud free?

Ридан Cloud 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 Ридан Cloud or Engineer's Unit Converter have ads?

Engineer's Unit Converter shows ads; Ридан Cloud does not.

### Which is updated more often, Ридан Cloud or Engineer's Unit Converter?

Ридан Cloud ships an update every 4 months, and Engineer's Unit Converter monthly. Most recently, Ридан Cloud was updated on September 15, 2026 and Engineer's Unit Converter on September 10, 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.*