# Radioactivity vs CloudLabs Aldehyde Synthesis

The clearest difference is price: CloudLabs Aldehyde Synthesis at Free against Radioactivity's $0.99. CloudLabs Aldehyde Synthesis also leads on device support (3 vs 1) and iOS requirement (9.0 vs 12.0). On update cadence, ads and in-app purchases there is nothing between them.

CloudLabs Aldehyde Synthesis is free to download; Radioactivity costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Radioactivity ships an update every 36 months, CloudLabs Aldehyde Synthesis every 29 months. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Radioactivity | CloudLabs Aldehyde Synthesis |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 29 months** |
| Size | 52 MB | 82 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Jiovany Orozco](https://appshunter.io/developer/1114670847) |

## What reviewers say

### Radioactivity

[App page](https://appshunter.io/ios/app/radioactivity-physics/id1136130171)

**Features:** macOS Compatibility

**In-app purchases:** none


### CloudLabs Aldehyde Synthesis

[App page](https://appshunter.io/ios/app/cloudlabs-aldehyde-synthesis/id1596512819)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radioactivity free?

Radioactivity costs $0.99, with no in-app purchases.

### Is CloudLabs Aldehyde Synthesis free?

CloudLabs Aldehyde Synthesis is free to download, with no in-app purchases.

### Do Radioactivity or CloudLabs Aldehyde Synthesis have ads?

Neither Radioactivity nor CloudLabs Aldehyde Synthesis shows ads.

### Which is updated more often, Radioactivity or CloudLabs Aldehyde Synthesis?

Radioactivity ships an update every 36 months, and CloudLabs Aldehyde Synthesis every 29 months. Most recently, Radioactivity was updated on October 3, 2026 and CloudLabs Aldehyde Synthesis on October 9, 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.*