# EMF Radiation Detector Reader vs GMCMap

The clearest difference is in-app purchases: GMCMap at none against EMF Radiation Detector Reader's 2. GMCMap also leads on ads (none vs shown) and review sentiment (70% vs 53%). EMF Radiation Detector Reader's advantage is rating (4.5 vs 4.1) and ratings volume (4.7K vs 19). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. EMF Radiation Detector Reader sells 2 in-app purchases, starting at $1.99 per 7 days. GMCMap asks for nothing beyond the download.

EMF Radiation Detector Reader holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 4.7K ratings behind it against 19, so its average is the more settled of the two. Written reviews complicate that: 53% of EMF Radiation Detector Reader's written reviews are positive against 70% of GMCMap's, so the app with the better star average is not the one people write more warmly about.

EMF Radiation Detector Reader ships an update every 7 months, GMCMap every 5 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | EMF Radiation Detector Reader | GMCMap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4.7K ratings)](https://appshunter.io/ios/app/emf-radiation-detector-reader/id1507914734/reviews)** | [4.1 (19 ratings)](https://appshunter.io/ios/app/gmcmap/id6459882680/reviews) |
| Number of ratings | **4.7K** | 19 |
| Positive reviews | 52.8% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 5 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 27 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rounding Squares BV](https://appshunter.io/developer/976539506) | [GQ Electronics LLC](https://appshunter.io/developer/1379843069) |

## What reviewers say

### EMF Radiation Detector Reader

[App page](https://appshunter.io/ios/app/emf-radiation-detector-reader/id1507914734)

Detect electromagnetic fields (EMF) around you using your phone's sensors. Identify high-radiation zones in your home and workplace to better organize your environment and potentially improve well-being. Measure EMF emitted by various electronic devices and appliances.

**Highlights:** Detect EMF radiation, Measure EMF levels, Identify risk zones, Organize living space, Measure appliance emissions, No expensive equipment needed

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EMF Radiation Detector Premium Week | $1.99 | per 7 days |
| EMF Radiation Detector Premium Year | $9.99 | per year |

**What reviewers like**

- 👍 Works well around microwave
- 👍 Consistent results
- 👍 Useful tool for detecting EMF
- 👍 Legit EMF detection
- 👍 Helps find problem areas

**What reviewers complain about**

- 🐛 Ads cover reading numbers
- 🔍 Unclear how to interpret readings
- ⚠️ Questionable accuracy, only detects magnets
- 🔍 No explanation of safe/unsafe levels
- 🐛 Doesn't detect radio frequencies

**Reported bugs**

- Readings inconsistent or inaccurate
- Doesn't work as expected, only detects magnets

**Requested features**

- Add sound or vibration alerts for high EMF
- Provide more information on EMF levels and safety
- Improve layout to avoid ads covering readings


### GMCMap

[App page](https://appshunter.io/ios/app/gmcmap/id6459882680)

This app provides a real-time radiation map of the world, displaying current radiation levels from monitoring stations globally. It features an interactive map, historical data, and trend analysis for comprehensive environmental vigilance.

**Highlights:** Real-time radiation data, Global coverage map, Interactive map interface, Historical data and trends, Mobile convenience

**In-app purchases:** none


## Frequently asked questions

### Is EMF Radiation Detector Reader free?

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

### Is GMCMap free?

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

### Which has better reviews, EMF Radiation Detector Reader or GMCMap?

EMF Radiation Detector Reader is rated higher. EMF Radiation Detector Reader averages 4.5 out of 5 from 4.7K ratings, while GMCMap averages 4.1 from 19 ratings.

### Do EMF Radiation Detector Reader or GMCMap have ads?

EMF Radiation Detector Reader shows ads; GMCMap does not.

### Which is updated more often, EMF Radiation Detector Reader or GMCMap?

EMF Radiation Detector Reader ships an update every 7 months, and GMCMap every 5 months. Most recently, EMF Radiation Detector Reader was updated on September 24, 2026 and GMCMap on September 22, 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.*