# Radon Sniffer vs Sensor Technology Engineering

The clearest difference is update cadence: Radon Sniffer at every 2 months against Sensor Technology Engineering's every 7 months. 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.

Radon Sniffer ships an update every 2 months, Sensor Technology Engineering every 7 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Radon Sniffer | Sensor Technology Engineering |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free | — |
| Size | 14 MB | 94 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Environmental Instruments Canada Inc.](https://appshunter.io/developer/1223543930) | [Sensor Technology Engineering](https://appshunter.io/developer/1668239053) |

## 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


### Sensor Technology Engineering

[App page](https://appshunter.io/ios/app/sensor-technology-engineering/id1627959712)

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

**In-app purchases:** none


## Frequently asked questions

### Is Radon Sniffer free?

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

### Is Sensor Technology Engineering free?

Sensor Technology Engineering is free to download, with no in-app purchases.

### Do Radon Sniffer or Sensor Technology Engineering have ads?

Neither Radon Sniffer nor Sensor Technology Engineering shows ads.

### Which is updated more often, Radon Sniffer or Sensor Technology Engineering?

Radon Sniffer ships an update every 2 months, and Sensor Technology Engineering every 7 months. Most recently, Radon Sniffer was updated on October 26, 2026 and Sensor Technology Engineering on October 25, 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.*