# Electromagnetic Detector PRO vs AlerTrax

The clearest difference is price: AlerTrax at Free against Electromagnetic Detector PRO's $4.99. AlerTrax also leads on review sentiment (100% vs 57%) and rating (5.0 vs 4.3). Electromagnetic Detector PRO's advantage is ratings volume (12 vs 2) and iOS requirement (11.2 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

AlerTrax is free to download; Electromagnetic Detector PRO costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AlerTrax holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Electromagnetic Detector PRO has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 57% of Electromagnetic Detector PRO's written reviews are positive against 100% of AlerTrax's.

Electromagnetic Detector PRO ships an update every 14 months, AlerTrax monthly. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Electromagnetic Detector PRO | AlerTrax |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (12 ratings)](https://appshunter.io/ios/app/electromagnetic-detector-pro/id1350384533/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/alertrax/id1554595354/reviews)** |
| Number of ratings | **12** | 2 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 55 MB | 44 MB |
| Requires iOS | **11.2** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Gregorio Martin Bello](https://appshunter.io/developer/567988393) | [NautAlert, LLC.](https://appshunter.io/developer/1451019471) |

## What reviewers say

### Electromagnetic Detector PRO

[App page](https://appshunter.io/ios/app/electromagnetic-detector-pro/id1350384533)

Transform your device into an electromagnetic field detector to identify high-risk wireless zones and potential sources of radiation. Receive warnings for strong magnetic fields and record measurements with timestamps. Useful for detecting metallic objects behind walls or underground.

**Highlights:** Detect electromagnetic fields (EMF), Warning beep for high radiation, Measure magnetic force on three axes, Record readings with timestamps, Store up to 100 records, Send measures via email

**Features:** macOS Compatibility

**In-app purchases:** none


### AlerTrax

[App page](https://appshunter.io/ios/app/alertrax/id1554595354)

Track valuable assets like trailers, motorcycles, and equipment with GPS. Receive real-time location updates and get alerts if your items move or leave designated areas.

**Highlights:** Real-time GPS location tracking, Movement detection alerts, Geofencing capabilities, Supports various assets (trailers, vehicles, equipment), Easy device mounting

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

**In-app purchases:** none


## Frequently asked questions

### Is Electromagnetic Detector PRO free?

Electromagnetic Detector PRO costs $4.99, with no in-app purchases.

### Is AlerTrax free?

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

### Which has better reviews, Electromagnetic Detector PRO or AlerTrax?

AlerTrax is rated higher. Electromagnetic Detector PRO averages 4.3 out of 5 from 12 ratings, while AlerTrax averages 5.0 from 2 ratings.

### Do Electromagnetic Detector PRO or AlerTrax have ads?

Neither Electromagnetic Detector PRO nor AlerTrax shows ads.

### Which is updated more often, Electromagnetic Detector PRO or AlerTrax?

Electromagnetic Detector PRO ships an update every 14 months, and AlerTrax monthly. Most recently, Electromagnetic Detector PRO was updated on October 3, 2026 and AlerTrax on September 30, 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.*