# Radioactivity vs Physical Chemistry Practice

The clearest difference is update cadence: Physical Chemistry Practice at every 3 weeks against Radioactivity's every 36 months. Physical Chemistry Practice also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Radioactivity costs $0.99 and Physical Chemistry Practice $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

Radioactivity ships an update every 36 months, Physical Chemistry Practice every 3 weeks. The most recent releases landed on October 26, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Radioactivity | Physical Chemistry Practice |
| --- | --- | --- |
| Price | $0.99 | **$0.49** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 3 weeks** |
| Size | 52 MB | 22 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Manish Kumar](https://appshunter.io/developer/1854995154) |

## What reviewers say

### Radioactivity

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Physical Chemistry Practice

[App page](https://appshunter.io/ios/app/physical-chemistry-practice/id6756110487)

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

**In-app purchases:** none


## Frequently asked questions

### Is Radioactivity free?

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

### Is Physical Chemistry Practice free?

Physical Chemistry Practice costs $0.49, with no in-app purchases.

### Do Radioactivity or Physical Chemistry Practice have ads?

Neither Radioactivity nor Physical Chemistry Practice shows ads.

### Which is updated more often, Radioactivity or Physical Chemistry Practice?

Radioactivity ships an update every 36 months, and Physical Chemistry Practice every 3 weeks. Most recently, Radioactivity was updated on October 26, 2026 and Physical Chemistry Practice on October 20, 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.*