# Magnetometer vs EMF Detector

Magnetometer and EMF Detector both sit at 4.4 stars, but that hides the real split: 86% of Magnetometer's written reviews are positive against 25% of EMF Detector's. Magnetometer also leads on in-app purchases (none vs 3). EMF Detector's advantage is price (Free vs $0.99) and update cadence (every 2 weeks vs every 34 months). On rating and ads there is nothing between them.

EMF Detector is free to download; Magnetometer costs $0.99 up front. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. Magnetometer asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.4 for Magnetometer against 4.3 for EMF Detector. That said, the two scores are not equally well evidenced: EMF Detector has 319 ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 86% of Magnetometer's written reviews are positive against 25% of EMF Detector's.

Magnetometer ships an update every 34 months, EMF Detector every 2 weeks. The most recent releases landed on September 7, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Magnetometer | EMF Detector |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.4 (13 ratings)](https://appshunter.io/ios/app/magnetometer/id1662997574/reviews)** | [4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews) |
| Number of ratings | 13 | **319** |
| Positive reviews | **85.7% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 11 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bogdan Gavriluta](https://appshunter.io/developer/1584690995) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### Magnetometer

[App page](https://appshunter.io/ios/app/magnetometer/id1662997574)

This application uses your iPhone's compass to detect electromagnetic interference, helping you find metal objects or magnets. It's designed for fun and experimental purposes, not as a professional tool. Discover hidden metal items or simply explore the magnetic fields around you.

**Highlights:** Detects metal and magnets, Uses iPhone's compass, Measures EMF interference, Fun and experimental use, Simple user interface

**In-app purchases:** none


### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713)

Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.

**Highlights:** EMF monitoring, Electromagnetic field detection, Radiation level measurement, Environmental safety assessment, Real-time EMF readings

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| unlimited features | $4.99 | per month |
| unlimited features | $14.99 | one-time |


## Frequently asked questions

### Is Magnetometer free?

Magnetometer costs $0.99, with no in-app purchases.

### Is EMF Detector free?

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

### Which has better reviews, Magnetometer or EMF Detector?

Magnetometer is rated higher. Magnetometer averages 4.4 out of 5 from 13 ratings, while EMF Detector averages 4.3 from 319 ratings.

### Do Magnetometer or EMF Detector have ads?

Neither Magnetometer nor EMF Detector shows ads.

### Which is updated more often, Magnetometer or EMF Detector?

Magnetometer ships an update every 34 months, and EMF Detector every 2 weeks. Most recently, Magnetometer was updated on September 7, 2026 and EMF Detector on September 21, 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.*