# RadonEye vs Temp Master

The clearest difference is rating: Temp Master at 3.2 against RadonEye's 2.4. Temp Master also leads on monetization model (free vs paid) and review sentiment (40% vs 20%). RadonEye's advantage is ratings volume (47 vs 12). 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.

Temp Master holds the better App Store score, 3.2 against 2.4. Both are backed by a comparable volume of ratings — 47 and 12 respectively. Written reviews point the same way: 20% of RadonEye's written reviews are positive against 40% of Temp Master's.

RadonEye ships an update every 3 months, Temp Master every 5 weeks. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | RadonEye | Temp Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (47 ratings)](https://appshunter.io/ios/app/radoneye/id1491883383/reviews) | **[3.2 (12 ratings)](https://appshunter.io/ios/app/temp-master/id6737321665/reviews)** |
| Number of ratings | **47** | 12 |
| Positive reviews | 19.6% of reviews | **40.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 29 MB | 43 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FTLab](https://appshunter.io/developer/897369751) | [Thermal Master Technology Co.,Ltd.](https://appshunter.io/developer/1770222118) |

## 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


### Temp Master

[App page](https://appshunter.io/ios/app/temp-master/id6737321665)

This utility app enhances thermal imaging capabilities for compatible Thermal Master devices, offering precise temperature detection and advanced image analysis. It allows users to view, save, and export thermal data offline, with features like digital zoom and improved resolution for various inspection tasks.

**Highlights:** High-accuracy temperature detection, Enhanced infrared resolution, Offline data viewing and export, Up to 15x digital zoom, Reduced background noise, Long battery life optimization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RadonEye free?

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

### Is Temp Master free?

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

### Which has better reviews, RadonEye or Temp Master?

Temp Master is rated higher. RadonEye averages 2.4 out of 5 from 47 ratings, while Temp Master averages 3.2 from 12 ratings.

### Do RadonEye or Temp Master have ads?

Neither RadonEye nor Temp Master shows ads.

### Which is updated more often, RadonEye or Temp Master?

RadonEye ships an update every 3 months, and Temp Master every 5 weeks. Most recently, RadonEye was updated on October 9, 2026 and Temp Master on October 1, 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.*