Comparison

EMF Detector vs Real EMF Detector

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

Head to head
About

EMF Detector

This app uses your phone's magnetometer to measure and display magnetic fields. It offers standard and paranormal measurement modes, helps locate sources of EMF, and allows you to record and export your readings.

Highlights
  • Live magnetic field gauge
  • Standard and paranormal modes
  • Source finding tool
  • Measurement session recording
  • CSV export
  • 24-hour exposure chart
  • Spirit Box entertainment mode
Features
Read full description

EMF Detector reads your phone's magnetometer and shows the magnetic field around you in µT or mG: on a live gauge, as separate X, Y and Z axes, and over the last 24 hours. START IN ONE TAP Tap the gauge, or the green START button under it. The app first separates the phone's own magnetism from the field around you. While it says "Calibrating…", turn the phone slowly in a figure-8 for a few seconds; the live reading then appears and stays steadier while you tilt the phone. A short vibration confirms every start and stop. TWO WAYS TO MEASURE • Standard: a radial gauge with plain-language levels from "No EMF detected" upward. In Settings you can switch it to a Safety view that labels a reading as background, weak field, wiring detected or live wire (an estimate from field strength, not proof of a wire) and sets it against ICNIRP reference levels for the general public or for workers. • Paranormal: records a quiet baseline first, then rates each spike against it on a five-step scale and marks it on a session timeline. FIND THE SOURCE The Source tab turns the reading into a warmer / colder hunt. Move the phone slowly around the room; the indicator shows whether the reading is rising or falling, and the X/Y/Z bars show the sensor's value on each axis. KEEP A RECORD • Measurement sessions are saved with their minimum, average and maximum • A 7-day trend with insights, such as how a reading compares with your usual level • Notes and favorites for each reading, plus a side-by-side compare view • CSV export of your history, and share-as-image for the current reading • A 24-hour exposure chart on the main screen • Peak hold, and "Zero here" to re-learn the baseline in a new spot • Calibration offset, µT or mG units, and a choice of reference levels TIPS FOR A GOOD READING 1. Start away from speakers, magnetic cases and car mounts, and do the figure-8 until the number appears. 2. Hold the phone flat and sweep slowly, a few centimetres from the wall or appliance. 3. Watch for a rise against your starting level rather than one absolute number. 4. Tap "Zero here" when you move to a new room so the baseline is re-learned there. FOR GHOST-HUNTING NIGHTS Spirit Box turns the live field into pulses, vibration and spoken words. It is entertainment: field spikes come from wiring, motors, magnets and the phone itself, and no spirits are detected. A Halloween theme can be switched on in Settings. HONEST TECH NOTE A phone magnetometer measures static and slowly changing magnetic fields: steel, magnets, motors, transformers and wiring under load. It samples about ten times a second, so it cannot measure 50/60 Hz mains fields accurately, and it cannot detect radio frequency, Wi-Fi, 5G or radiation. It is not a certified safety instrument; use it to explore and compare readings around your home. Made for curious people comparing readings around appliances and from room to room, and for paranormal investigators.

About

Real EMF Detector

Features
Read full description

Measure magnetic fields with real sensor data. Real EMF Detector turns your iPhone into a precision magnetometer using the built-in calibrated magnetic field sensor to detect and measure DC magnetic fields around you. CALIBRATED SENSOR TECHNOLOGY - Uses Core Motion calibrated magnetic field data that removes device self-interference - X, Y, Z axis breakdown showing directional field components - Total field magnitude in microtesla with continuous updates - More accurate than raw magnetometer apps that include phone hardware noise REAL-TIME DETECTOR - Large circular gauge with smooth animated needle - Color-coded safety levels: Background, Normal, Elevated, Strong, Very Strong - Instant response as you move through your environment - Configurable threshold alerts with haptic feedback LIVE GRAPH - Real-time scrolling chart built with Swift Charts - Track magnetic field changes over time as you scan - Pinch to zoom and scroll through recorded data - X, Y, Z axis overlay for detailed field analysis STUD & METAL SCANNER - Detect metal objects, pipes, and wiring behind walls - Find studs by scanning for nail and screw patterns - Audio and haptic feedback as field strength changes - Sensitivity adjustment for different scanning needs SESSION HISTORY - Record complete measurement sessions with one tap - Review past sessions with full statistics and timeline - Export session data as CSV for further analysis - Stored locally with SwiftData for fast access LEARN & UNDERSTAND - Educational guide to magnetic fields and EMF science - Understand what your readings mean in everyday context - Reference chart comparing common magnetic field sources - Safety information based on published exposure guidelines COMMON USES - Home inspection: check appliances, wiring, and electrical panels - Stud finding: locate metal fasteners behind drywall - Education: learn about magnetism and electromagnetic fields - Hobby and exploration: investigate unusual magnetic sources - Workplace assessment: identify strong field areas HONEST ABOUT LIMITATIONS Real EMF Detector measures DC magnetic fields using the iPhone magnetometer. It cannot detect RF signals, Wi-Fi, cellular (5G/4G), AC electromagnetic fields, or electric fields. For those measurements, specialized equipment is required. What it does measure, it measures well -- with calibrated data that most competing apps lack. Built with SwiftUI, Swift Charts, and Core Motion. No ads, no data collection. Terms of Use: https://emfdetector.mobilealchemy.co/terms Privacy Policy: https://emfdetector.mobilealchemy.co/privacy

Screenshots

EMF Detector3 screens
Real EMF Detector4 screens

Verdict

The call

The clearest difference is in-app purchases: EMF Detector at none against Real EMF Detector's 4. EMF Detector also leads on update cadence (every 5 days vs fortnightly). Real EMF Detector's advantage is ads (none vs shown). On price, device support and iOS requirement 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. Real EMF Detector sells 4 in-app purchases, starting at $1.99 per 7 days. EMF Detector asks for nothing beyond the download.

UpkeepUpdate frequency

EMF Detector ships an update every 5 days, Real EMF Detector fortnightly. The most recent releases landed on November 5, 2026 and November 7, 2026 respectively.

Scorecard3 real differences · 6 level
EMF Detector versus Real EMF Detector: the parameters behind the verdict, then further details
ParameterEMF DetectorReal EMF Detector
PriceFreeFree
Rating3.9 (9 ratings) — better—
Number of ratings9 — better—
Update frequencyEvery 5 days — betterFortnightly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.4 — better17.0
Further details — not scored
Size79 MB17 MB
Age rating17++4
DeveloperKyu-Hee JangMOBILE ALCHEMY LTD

In-app purchases

None

EMF Detector

No in-app purchases

4 purchases

Real EMF Detector

Subscriptions3
  • EMF Detector Pro3 Days trial$1.997 Days
  • EMF Detector Pro7 Days trial$4.991 Month
  • EMF Detector Pro7 Days trial$19.991 Year
One-time1
  • EMF Detector Pro – Lifetime$39.99

Questions

Is EMF Detector free?
EMF Detector is free to download, with no in-app purchases.
Is Real EMF Detector free?
Real EMF Detector is free to download, with in-app purchases available.
Do EMF Detector or Real EMF Detector have ads?
EMF Detector shows ads; Real EMF Detector does not.
Which is updated more often, EMF Detector or Real EMF Detector?
EMF Detector ships an update every 5 days, and Real EMF Detector fortnightly. Most recently, EMF Detector was updated on November 5, 2026 and Real EMF Detector on November 7, 2026.

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