# Radon Sniffer vs DIRX2

Radon Sniffer and DIRX2 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Radon Sniffer ships an update every 2 months, DIRX2 every 3 months. The most recent releases landed on September 24, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Radon Sniffer | DIRX2 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | — |
| Size | 14 MB | 9 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Environmental Instruments Canada Inc.](https://appshunter.io/developer/1223543930) | [Tapwow, Llc](https://appshunter.io/developer/1475161787) |

## What reviewers say

### Radon Sniffer

[App page](https://appshunter.io/ios/app/radon-sniffer/id1271539715)

This utility app connects to a specific radon detection device via Bluetooth. It allows users to monitor radon levels in real-time, set up timed measurements, and configure device settings for expanded functionality.

**Highlights:** Real-time radon level monitoring, Bluetooth Low Energy connectivity, Timed run functionality, Configurable device settings, Companion app for CT007R hardware

**Features:** macOS Compatibility

**In-app purchases:** none


### DIRX2

[App page](https://appshunter.io/ios/app/dirx2/id1497933863)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radon Sniffer free?

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

### Is DIRX2 free?

DIRX2 is free to download, with no in-app purchases.

### Do Radon Sniffer or DIRX2 have ads?

Neither Radon Sniffer nor DIRX2 shows ads.

### Which is updated more often, Radon Sniffer or DIRX2?

Radon Sniffer ships an update every 2 months, and DIRX2 every 3 months. Most recently, Radon Sniffer was updated on September 24, 2026 and DIRX2 on May 16, 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.*