# Radioactivity Conversion vs VMC Active

The clearest difference is price: VMC Active at Free against Radioactivity Conversion's $2.99. Radioactivity Conversion's advantage is iOS requirement (13 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

VMC Active is free to download; Radioactivity Conversion costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Radioactivity Conversion ships an update every 28 months, VMC Active every 31 months. The most recent releases landed on June 12, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Radioactivity Conversion | VMC Active |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/radioactivity-conversion/id561349846/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 28 months** | Every 31 months |
| Monetization | Paid | — |
| Size | 1 MB | 24 MB |
| Requires iOS | **13** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Zepping Innovative Solutions](https://appshunter.io/developer/1142285258) |

## What reviewers say

### Radioactivity Conversion

[App page](https://appshunter.io/ios/app/radioactivity-conversion/id561349846)

Easily convert between various units related to radioactive decay. Understand the process of emitting radioactive particles and the properties of elements exhibiting radioactivity.

**Highlights:** Radioactive decay unit conversion, Information on radioactive decay process, Details on radioactive particles, Explanation of half-life, Properties of radioactive elements

**Features:** macOS Compatibility

**In-app purchases:** none


### VMC Active

[App page](https://appshunter.io/ios/app/vmc-active/id6450957830)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radioactivity Conversion free?

Radioactivity Conversion costs $2.99, with no in-app purchases.

### Is VMC Active free?

VMC Active is free to download, with no in-app purchases.

### Do Radioactivity Conversion or VMC Active have ads?

Neither Radioactivity Conversion nor VMC Active shows ads.

### Which is updated more often, Radioactivity Conversion or VMC Active?

Radioactivity Conversion ships an update every 28 months, and VMC Active every 31 months. Most recently, Radioactivity Conversion was updated on June 12, 2026 and VMC Active 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.*