Comparison

Magnetic Detector, Stud Finder vs EMF Radiation Detector Reader

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

Head to head
About

Magnetic Detector, Stud Finder

This app uses your device's magnetometer to detect magnetic and electromagnetic fields. It helps locate metal objects, hidden wires, pipes, and even wood studs behind walls. Get real-time readings and alerts to explore your surroundings.

Highlights
  • Detects magnetic and EMF fields
  • Locates metal objects, wires, and pipes
  • Finds hidden wood studs behind walls
  • Real-time magnetic field intensity readings (μT & mG)
  • Active detection beep alerts
  • Automatic storage of time and measurements
Features
Read full description

Turn your iPhone into a powerful Magnetic Detector and Metal Detector. Detect nearby magnetic fields, find hidden metal screws and nails, scan walls for magnetic objects, and measure EMF magnetic field activity in real time using your device's built-in magnetometer. Whether you're searching for metal fasteners behind walls, exploring magnetic sources, or measuring magnetic field strength, Magnetic Detector makes it easy to visualize changes in your surroundings. Magnetic Detector is handy for comparing readings around appliances, walls, and everyday objects. When used as a Metal Detector, it can help you spot nearby iron or steel items by showing changes in the magnetic field. FIND HIDDEN METAL OBJECTS Use your iPhone as a magnetic metal detector to help locate ferromagnetic objects such as iron and steel screws, nails, certain pipes, metal fittings, and other magnetic materials. Move your device slowly along walls or plasterboard to detect magnetic disturbances. Metal fasteners may help indicate the location of hidden wall studs. DETECT & MEASURE MAGNETIC FIELDS Transform your device into a real-time EMF magnetic field meter. Monitor magnetic field intensity with an intuitive digital gauge and observe how measurements change as you approach magnetic objects. The app displays magnetic field strength in: - μT (microtesla) - mG (milligauss) Earth's magnetic field is typically 25–65 μT. 1 μT equals 10 mG. POWERFUL DETECTION FEATURES - Real-time magnetic field and EMF magnetic field measurements. - Magnetic metal detection using your device's built-in magnetometer. - Interactive gauge displaying magnetic field intensity. - Audible warning when the magnetic field exceeds the configured threshold. - Automatic recording of measurements and timestamps. - Three-axis magnetic field readings (Bx, By, Bz). - 3D visualization of magnetic field measurements. - Room scanning to explore magnetic hotspots. - Support for microtesla and milligauss measurements. USE YOUR IPHONE AS A STUD FINDER Searching for hidden screws or nails in a wall? Magnetic Detector can help identify nearby ferromagnetic fasteners that may indicate the position of wooden studs or metal structures. IDEAL FOR DIY, EDUCATION & EXPLORATION Magnetic Detector can be useful for: - DIY enthusiasts and handymen exploring walls for magnetic fasteners. - Students conducting physics experiments and school projects. - Teachers demonstrating magnetic field behavior. - Engineers and technology enthusiasts studying magnetic measurements. - Anyone curious about magnetic activity around electronic devices, speakers, magnets, and other objects. HOW DOES IT WORK? The app uses the magnetometer integrated into your iPhone to measure nearby magnetic field strength. Ferromagnetic objects can produce or disturb local magnetic fields. As you move your device closer to these objects, the magnetic field readings may change, helping you identify potential magnetic sources. Tip: Shake your device to help recalibrate the magnetic sensor. Keep your phone away from magnetic accessories that could interfere with measurements. IMPORTANT INFORMATION Magnetic Detector is designed for personal, educational, and entertainment purposes. It is not a replacement for professional metal detectors, stud finders, electrical wire detectors, or safety equipment. Detection is primarily limited to nearby magnetic and ferromagnetic materials. The app cannot directly detect wooden studs, non-magnetic metals such as copper or aluminum, or reliably identify electrical wiring. Always verify wall conditions with appropriate professional tools before drilling. Accuracy depends on your device, distance, and magnetic interference. If you experience any issues or have suggestions, please contact us and include your device model and iOS version. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

EMF Radiation Detector Reader

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
Read full description

> Detect Invisible Fields: Find the ElectroMagnetic Fields around you in seconds > Pro-Grade Precision: High-accuracy Magnetic Field Analyzer & Gauss Meter with Advanced Signal Stabilization. > Record, Analyze & Export: track trends with interactive data charts and save detailed logs for professional analysis. Check out the areas where you work (desk, meeting rooms), where you sleep (bed), where you relax (couch, living room) and find the levels of EMF you are exposed to. Also use the app to measure the fields emitted by your appliances (computer, fridge, speaker, phone...). PROFESSIONAL MAGNETIC FIELD ANALYZER & GAUSS METER: Discover the invisible magnetic world around you. Using your device’s internal magnetometer, the app provides a comprehensive look at the electromagnetic fields (ELF) generated by electronic devices, wiring, and ferromagnetic materials. NEW PROFESSIONAL FEATURES: - 3-Axis Vector Analysis: Real-time $x, y,$ and $z$ coordinate tracking for precise field directionality. - Interactive History Graphs: Visualize time evolution with high-resolution charts that track spikes and trends. - Clean Signal Mode (LPF): Toggle an advanced Low-Pass Filter to stabilize readings and remove sensor jitter for professional-grade clarity - Save & Export Logs: Record your sessions and export data for further analysis in external software. VERSATILE USE CASES: Electronics Inspection: Measure the magnetic footprint of computers, speakers, and home appliances. Metal Detection: Locate ferromagnetic objects like iron pipes or steel studs behind walls. Interference Calibration: Find the "quietest" zones for sensitive electronic equipment or audio setups. USER EXPECTATIONS & DISCLOSURE: This app is designed as a sophisticated utility for detecting Magnetic Fields (ELF). What it detects: Magnetic flux from magnets, ferrous metals, and the low-frequency electromagnetic fields emitted by electronic components, power supplies, and speakers. What it does NOT detect: This app is not a radio frequency (RF) scanner. It cannot detect Wi-Fi signals, Bluetooth, 5G cellular radiation, or microwave leakage. DISCLAIMER: - This app is intended for educational and utility purposes. It is not a substitute for certified industrial or scientific equipment. It does not provide medical advice or guarantee "safe zones" in a clinical sense. This app does not guarantee exact measures as other fields can interfere with the compass inside your phone, which is used to detect the fields. SUBSCRIPTIONS: - Length: weekly, yearly - Your payment will be charged at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - To Manage or Cancel your subscription, it can be done via the Settings app of your device. For more detail, see https://support.apple.com/en-us/118428 . - To Manage or Cancel your subscription, it can also be done directly from the app: Go to ‘Settings’ screen inside our app, tap on ‘Manage Subscriptions’ and the app will directly open the list of your Subscriptions with the AppStore. You can select a subscription and check available plans or cancel subscription. - When canceling a subscription, your subscription will remain active until the end of the period. Auto-renewal will be disabled but the current subscription will not be refunded. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Read our Privacy Policy at: https://roundingsquares.com/privacy/ Read our Terms of Use at: https://roundingsquares.com/terms/

Screenshots

Magnetic Detector, Stud Finder4 screens
EMF Radiation Detector Reader3 screens

Verdict

The call

Magnetic Detector, Stud Finder and EMF Radiation Detector Reader both sit at 4.6 stars, but that hides the real split: 90% of Magnetic Detector, Stud Finder's written reviews are positive against 54% of EMF Radiation Detector Reader's. Magnetic Detector, Stud Finder also leads on update cadence (every 2 months vs every 6 months). EMF Radiation Detector Reader's advantage is ratings volume (5K vs 444). On price, rating, ads and in-app purchases 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

Both are free to download. Magnetic Detector, Stud Finder sells 4 in-app purchases, starting at $4.99 per 7 days and EMF Radiation Detector Reader sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Magnetic Detector, Stud Finder against 4.5 for EMF Radiation Detector Reader. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 5K ratings behind it against 444, so its average is the more settled of the two. Written reviews are what separate them: 90% of Magnetic Detector, Stud Finder's written reviews are positive against 54% of EMF Radiation Detector Reader's.

UpkeepUpdate frequency

Magnetic Detector, Stud Finder ships an update every 2 months, EMF Radiation Detector Reader every 6 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
Magnetic Detector, Stud Finder versus EMF Radiation Detector Reader: the parameters behind the verdict, then further details
ParameterMagnetic Detector, Stud FinderEMF Radiation Detector Reader
PriceFreeFree
Rating4.6 (444 ratings) — better4.5 (5K ratings)
Positive reviews90.3% of reviews — better53.5% of reviews
Number of ratings4445K — better
Update frequencyEvery 2 months — betterEvery 6 months
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.615.6
Further details — not scored
Size30 MB20 MB
Age rating4+4+
DeveloperJose BelloRounding Squares BV

Customer experience

Magnetic Detector, Stud Finder

All ratings444 ratings
Positive91.9%
Neutral2.5%
Negative5.6%
Written reviews359 reviews
Positive90.3%
Neutral3.6%
Negative6.1%

EMF Radiation Detector Reader

All ratings4,966 ratings
Positive87.5%
Neutral4.7%
Negative7.8%
Written reviews385 reviews
Positive53.5%
Neutral8.6%
Negative37.9%

User reviews

Magnetic Detector, Stud Finder

From 444 App Store ratings

What we love

  • ⭐ Accurate magnetic detection
  • 👍 Easy to use and intuitive
  • 🔍 Helpful for finding hidden metal objects
  • 🔧 Useful for troubleshooting mechanical issues (e.g., magnetized watches)

Room to improve

  • 💰 Ads can be intrusive in free version
  • 🔒 Concerns about privacy and data collection
  • 🔋 Potential impact on device battery life

EMF Radiation Detector Reader

From 5K App Store ratings

What we love

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

Room to improve

  • 🐛 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

Bugs and requests

Magnetic Detector, Stud Finder

Reported bugs

2 issues
  • Readings sometimes inconsistent or stop at certain thresholds
  • Compatibility issues with some devices

Requested features

3 requests
  • Add support for measuring electric fields
  • Improve accuracy and sensitivity
  • Provide more detailed readings and analysis

EMF Radiation Detector Reader

Reported bugs

2 issues
  • Readings inconsistent or inaccurate
  • Doesn't work as expected, only detects magnets

Requested features

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

In-app purchases

4 purchases

Magnetic Detector, Stud Finder

Subscriptions1
  • Weekly Full Access$4.997 Days
One-time3
  • Remove Ads - Magnetic Detector$2.99
  • Unlock all - Premium & Warning Beep$4.99
  • Lifetime Full Access$12.99
2 purchases

EMF Radiation Detector Reader

Subscriptions2
  • EMF Radiation Detector Premium Week3 Days trial$1.997 Days
  • EMF Radiation Detector Premium Year$9.991 Year

Questions

Is Magnetic Detector, Stud Finder free?
Magnetic Detector, Stud Finder is free to download, with in-app purchases available.
Is EMF Radiation Detector Reader free?
EMF Radiation Detector Reader is free to download, with in-app purchases available.
Which has better reviews, Magnetic Detector, Stud Finder or EMF Radiation Detector Reader?
Magnetic Detector, Stud Finder is rated higher. Magnetic Detector, Stud Finder averages 4.6 out of 5 from 444 ratings, while EMF Radiation Detector Reader averages 4.5 from 5K ratings.
Do Magnetic Detector, Stud Finder or EMF Radiation Detector Reader have ads?
Both Magnetic Detector, Stud Finder and EMF Radiation Detector Reader show ads.
Which is updated more often, Magnetic Detector, Stud Finder or EMF Radiation Detector Reader?
Magnetic Detector, Stud Finder ships an update every 2 months, and EMF Radiation Detector Reader every 6 months. Most recently, Magnetic Detector, Stud Finder was updated on November 3, 2026 and EMF Radiation Detector Reader on November 4, 2026.

Other comparisons