# RadonEye vs PQDIF Viewer

The clearest difference is update cadence: PQDIF Viewer at every 3 days against RadonEye's every 3 months. RadonEye's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RadonEye ships an update every 3 months, PQDIF Viewer every 3 days. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | RadonEye | PQDIF Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.4 (47 ratings)](https://appshunter.io/ios/app/radoneye/id1491883383/reviews)** | — |
| Number of ratings | **47** | — |
| Positive reviews | 19.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 29 MB | 4 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FTLab](https://appshunter.io/developer/897369751) | [Russell Patterson](https://appshunter.io/developer/1723606459) |

## What reviewers say

### RadonEye

[App page](https://appshunter.io/ios/app/radoneye/id1491883383)

This smart device provides real-time radon detection for your home. It offers high sensitivity and accurate measurements, with data accessible and configurable via a smartphone app.

**Highlights:** Real-time radon detection, High sensitivity and accuracy, Dual ionization chamber system, Fast initial data output (<1 hour), Bluetooth smartphone connectivity, Data recording and graphing, Customizable alarm settings

**Features:** macOS Compatibility

**In-app purchases:** none


### PQDIF Viewer

[App page](https://appshunter.io/ios/app/pqdif-viewer/id6769140607)

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

**In-app purchases:** none


## Frequently asked questions

### Is RadonEye free?

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

### Is PQDIF Viewer free?

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

### Do RadonEye or PQDIF Viewer have ads?

Neither RadonEye nor PQDIF Viewer shows ads.

### Which is updated more often, RadonEye or PQDIF Viewer?

RadonEye ships an update every 3 months, and PQDIF Viewer every 3 days. Most recently, RadonEye was updated on October 9, 2026 and PQDIF Viewer on October 8, 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.*