Comparison

EMF Field Detector RF Scanner vs Teslameter.

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

Head to head
About

EMF Field Detector RF Scanner

Detect electromagnetic fields (EMF) using your device's sensors. Get alerted to high magnetic fields and potential radiation sources in your home. Useful for identifying hidden emitters and understanding your environment.

Highlights
  • Detects electromagnetic fields (EMF)
  • Warns of high magnetic fields with beeps
  • Measures magnetic force on three axes
  • Records readings with time and date stamps
  • Stores up to 100 records
  • Sends measurements via email
Currently charting
Read full description

Turn your iPhone into a powerful EMF detector and magnetic field scanner. Detect electromagnetic fields (EMF) around you instantly using the built-in sensor already inside your device — no expensive equipment required. Whether you want to monitor electromagnetic radiation in your home, locate hidden magnetic sources, or even explore paranormal activity, this app gives you a simple and exciting way to measure the invisible world around you. Use the app to scan bedrooms, walls, electrical appliances, Wi-Fi zones, sockets, microwaves, wireless devices, and more. Discover areas with unusually high magnetic activity and receive an instant warning beep when strong EMF levels are detected. Many users also enjoy using the app during ghost hunts and paranormal investigations, as sudden magnetic fluctuations are often associated with supernatural activity. NEW: Experience EMF detection in Augmented Reality. Visualize electromagnetic fields in Augmented Reality to better understand how EMFs spread throughout your home, office, or workspace. The app allows you to see a figurative representation of magnetic activity around you, helping you identify high-radiation zones and understand how far electromagnetic fields may reach in real-world environments. Explore EMFs in a more immersive and intuitive way by combining real-time detection with AR visualization technology. Transform your iPhone into a digital EMF Meter, Teslameter, or electromagnetic field tester using the internal compass hardware. View live magnetic field readings in real time and monitor changes on all three axes (X, Y, Z). Scientists, engineers, students, teachers, paranormal investigators, and curious explorers use EMF detectors to measure magnetic activity in everyday environments. Why use this app? • Detect high electromagnetic field zones around you • Monitor EMF levels near beds, appliances, or workspaces • Receive warning alerts when strong magnetic radiation is detected • Track and store measurements with time and date stamps • Investigate unusual magnetic fluctuations during ghost hunting sessions • Find metallic objects, pipes, or hidden sources behind walls • Explore the invisible electromagnetic world around you Features: • Real-time EMF and magnetic field detection • Warning beep near strong radiation sources • Measures magnetic force on X, Y, and Z axes • Magnetic readings displayed in microteslas (µT) • Save up to 100 EMF records • Record events with exact date & time • Export and send measurements by email • Easy-to-use digital display interface Electromagnetic radiation may come from electrical wiring, appliances, wireless devices, cordless phones, Wi-Fi equipment, sockets, and other electronic sources in your environment. Tips: For best accuracy, calibrate your iPhone by moving it in a figure-8 motion before use. Important: This app requires an iPhone with compass hardware and will not work on iPod Touch devices. Disclaimer: This app is intended for entertainment and informational purposes only. It uses the iPhone magnetometer sensor to detect magnetic field variations near ferromagnetic objects and electromagnetic sources. Download now and start discovering the hidden electromagnetic activity around you.

About

Teslameter.

This utility app measures electromagnetic fields around you using your device's compass. It displays readings on X, Y, and Z axes in micro-teslas, along with a magnitude reading. Primarily for entertainment, it detects interference from magnetic objects or potential paranormal activity.

Highlights
  • Measures electromagnetic fields
  • Displays X, Y, Z axis readings
  • Calculates magnitude reading
  • Detects magnetic object interference
  • For entertainment purposes
Read full description

Teslameter lets you view current electromagnetic fields around you! To use, simply open Teslameter and bring your iPhone close to any ferromagnetic metal such as iron or steel, or any other magnetic object. Teslameter will measure the current magnetic fields on the X, Y, and Z axis in micro-teslas. In addition Teslameter displays a magnitude reading of (X^2+Y^2+Z^2). How exactly does it work? Since the iPhone 3GS/iPhone 4 includes a compass, Teslameter can measure the interference created by a ferromagnetic metal (or paranormal activity). Teslameter is NOT a true teslameter and shouldn't be used for anything but entertainment purposes.

Screenshots

EMF Field Detector RF Scanner4 screens
Teslameter.1 screens

Verdict

The call

The clearest difference is review sentiment: EMF Field Detector RF Scanner at 84% against Teslameter.'s 0%. EMF Field Detector RF Scanner also leads on rating (4.5 vs 2.0) and update cadence (every 3 weeks vs every 12 months). Teslameter.'s advantage is price (Free vs $4.99) and iOS requirement (12.0 vs 15.6). On ads, in-app purchases, monetization model 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

Teslameter. is free to download; EMF Field Detector RF Scanner costs $4.99 up front. EMF Field Detector RF Scanner sells 2 one-off in-app purchases and Teslameter. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

EMF Field Detector RF Scanner holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: EMF Field Detector RF Scanner has 5.5K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 84% of EMF Field Detector RF Scanner's written reviews are positive against 0% of Teslameter.'s.

UpkeepUpdate frequency

EMF Field Detector RF Scanner ships an update every 3 weeks, Teslameter. every 12 months. The most recent releases landed on September 29, 2026 and June 9, 2026 respectively.

Scorecard7 real differences · 4 level
EMF Field Detector RF Scanner versus Teslameter.: the parameters behind the verdict, then further details
ParameterEMF Field Detector RF ScannerTeslameter.
Price$4.99Free — better
Rating4.5 (5.5K ratings) — better2.0 (3 ratings)
Positive reviews84.1% of reviews — better0.0% of reviews
Number of ratings5.5K — better3
Update frequencyEvery 3 weeks — betterEvery 12 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#137 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size56 MB14 MB
Age rating4+4+
DeveloperJorge Gregorio Martin Bellomargaret kovatch

Customer experience

EMF Field Detector RF Scanner

All ratings5,535 ratings
Positive90.4%
Neutral5.4%
Negative4.2%
Written reviews580 reviews
Positive84.1%
Neutral5.9%
Negative10.0%

Teslameter.

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

EMF Field Detector RF Scanner

Reported bugs

2 issues
  • App freezes or stops working after updates
  • Readings not always accurate or reliable

Requested features

3 requests
  • Ability to export data
  • More detailed explanations and guidance
  • Compatibility with other EMF measurement devices

Teslameter.

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

EMF Field Detector RF Scanner

One-time2
  • Premium Pack$4.99
  • Special Offer$4.99
1 purchases

Teslameter.

One-time1
  • Remove Ads$1.99

Questions

Is EMF Field Detector RF Scanner free?
EMF Field Detector RF Scanner costs $4.99, and also offers in-app purchases.
Is Teslameter. free?
Teslameter. is free to download, with in-app purchases available.
Which has better reviews, EMF Field Detector RF Scanner or Teslameter.?
EMF Field Detector RF Scanner is rated higher. EMF Field Detector RF Scanner averages 4.5 out of 5 from 5.5K ratings, while Teslameter. averages 2.0 from 3 ratings.
Do EMF Field Detector RF Scanner or Teslameter. have ads?
Both EMF Field Detector RF Scanner and Teslameter. show ads.
Which is updated more often, EMF Field Detector RF Scanner or Teslameter.?
EMF Field Detector RF Scanner ships an update every 3 weeks, and Teslameter. every 12 months. Most recently, EMF Field Detector RF Scanner was updated on September 29, 2026 and Teslameter. on June 9, 2026.

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