Comparison

Electromagnetic Detector PRO vs AlerTrax

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Electromagnetic Detector PRO

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
Read full description

Detect the electromagnetic fields near you, known as EMF. It's not necessary an expensive electronic equipment. Your device is already a sensor to detect EMFs. Track when a high magnetic field has been measured while you take the mobile with yourself. A warning beep will be activated to warn you and prevent health problems. Use "Electromagnetic detector" as a scanner or as a EMF detector to detect high risk wireless zones. Check if your bed is EMF free! Appliances, microwaves and sockets could be now radiating you. Convert your iPhone into a EMF Meter (electromagnetic field tester) or as a teslameter. By using the internal compass hardware. You can view the raw data of the magnetic fields that are all around you on a digital display. Over a thousand research studies have linked EMFs to important biological effects. EMFs have been associated with symptoms such as nausea, headache, fatigue, anxiety, mental confusion, memory loss, sleep disturbance, itchy or burning skin sensations, and skin rashes. The electromagnetic radiation come from broken or lose wires behind the wall, or electrical socket, appliances and other electrical devices in the home. Finding pipes or other metallic objects under ground or behind walls. Detecting the presence of ghost. Clocks and radios near the bed may also contribute. Exposures to EMFs from cordless phones, cell phones, wireless computer equipment, Wi-Fi, etc. Scientist, Teachers, Students, Engineers, all use EMF Meter's for detecting magnetic fields of all types. ***Features: -You can track when a high magnetic field has been measured and when, so the current time is stored. -Warning beep near focus radiation. -Detect the strength of Magnetic force fields on all three axis’s (x,y,z). -Magnetic force is calculated in microteslas ( µT ) -Record your readings with a time & date stamp of each event. -Store until 100 records. -Send measures by email. Please observe and respect the iPhone user manual and warranty if you intend to use your iPhone as a scientific device. We are not responsible for any damage that you or any other force of nature may cause to your device. Tips: You may calibrate the detector by moving the iPhone in the form of an 8. Note: This app will not work on an iPod Touch, since it does not have a compass hardware. This app is intended for entertainment purposes only and does not provide true Metal Detector functionality. This apps uses the magnetometer to measure the magnetic field when the iPhone is placed near feromagnetic metal objects. If you would like to have a feature added to this app. Please let us know, so that we can make this happen as soon as possible for you. Download it now to prevent stay near magnetic radiations! (EMF).

About

AlerTrax

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
Read full description

Mount the AlerTrax LTE device to your trailer, motorcycle, ATV, snowmobile, jetski, construction equipment, boat or any other asset you want to track. Know the GPS location of your expensive equipment at a glance. Be notified of any movement or if it leaves a certain area.

Screenshots

Electromagnetic Detector PRO3 screens
AlerTrax4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Electromagnetic Detector PRO versus AlerTrax: the parameters behind the verdict, then further details
ParameterElectromagnetic Detector PROAlerTrax
Price$4.99Free — better
Rating4.3 (12 ratings)5.0 (2 ratings) — better
Positive reviews57.1% of reviews100.0% of reviews — better
Number of ratings12 — better2
Update frequencyEvery 14 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.2 — better14.0
Further details — not scored
Size55 MB44 MB
Age rating4+4+
DeveloperJorge Gregorio Martin BelloNautAlert, LLC.

Customer experience

Electromagnetic Detector PRO

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews7 reviews
Positive57.1%
Neutral0.0%
Negative42.9%

AlerTrax

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Electromagnetic Detector PRO

No in-app purchases

None

AlerTrax

No in-app purchases

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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