# Radonsystem vs Real EMF Detector

The clearest difference is in-app purchases: Radonsystem at none against Real EMF Detector's 4. Radonsystem also leads on iOS requirement (13.0 vs 17.0). Real EMF Detector's advantage is update cadence (fortnightly vs every 23 months). On price, ads and device support there is nothing between them.

Both are free to download. Real EMF Detector sells 4 in-app purchases, starting at $1.99 per 7 days. Radonsystem asks for nothing beyond the download.

Radonsystem ships an update every 23 months, Real EMF Detector fortnightly. Both last shipped on September 9, 2026.

## The numbers

| Metric | Radonsystem | Real EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Fortnightly** |
| Size | 4 MB | 11 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Bernitt](https://appshunter.io/developer/1551635659) | [MOBILE ALCHEMY LTD](https://appshunter.io/developer/1577973502) |

## What reviewers say

### Radonsystem

[App page](https://appshunter.io/ios/app/radonsystem/id1551635657)

**Features:** macOS Compatibility

**In-app purchases:** none


### Real EMF Detector

[App page](https://appshunter.io/ios/app/real-emf-detector/id6772847396)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EMF Detector Pro | $1.99 | per 7 days |
| EMF Detector Pro | $4.99 | per month |
| EMF Detector Pro | $19.99 | per year |
| EMF Detector Pro – Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Radonsystem free?

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

### Is Real EMF Detector free?

Real EMF Detector is free to download, with in-app purchases available.

### Do Radonsystem or Real EMF Detector have ads?

Neither Radonsystem nor Real EMF Detector shows ads.

### Which is updated more often, Radonsystem or Real EMF Detector?

Radonsystem ships an update every 23 months, and Real EMF Detector fortnightly. Most recently, Radonsystem was updated on September 9, 2026 and Real EMF Detector on September 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.*