EMF Detector - EMF Meter

About this app

EMF Detector turns your iPhone's magnetometer into a precise electromagnetic field scanner with three purpose-built modes — and now keeps a full history of every reading you take. THREE MODES • Auto — radial gauge with EMF level descriptions. • Safety — wire detection (background / weak / moderate / live wire) with reference zones based on ICNIRP public reference levels (safe / caution / danger) and household appliance references. • Paranormal — baseline-relative anomaly detection. After 5s of baseline measurement, alerts you with 5-level intensity when EMF spikes deviate from normal — classic ghost-hunting workflow. WHAT'S NEW • Measurement History — every reading is auto-saved with a 7-day trend chart and insights like "+12% vs your 7-day average". • Notes & Favorites — add a note ("bedroom wall outlet") and star to any saved reading. • Compare Mode — pick two saved readings and view the difference side by side. • Calibration Offset — fine-tune your sensor in ±1 µT steps. • Share Result — share your current EMF reading as an image. • CSV Export — share all your measurements as CSV for spreadsheets. REFERENCE LIBRARY • ICNIRP public reference level for 50/60 Hz (100 µT), shown for context • Household appliances: monitor, laptop, electric blanket, fridge, vacuum, induction cooktop, hair dryer • Wiring: background, weak field, wire detected, live wire • Paranormal classes 1–5 CORE FEATURES • Magnetometer-based magnetic field measurement (µT) • Real-time min/max/avg tracking • Radial gauge + chart visualization • Microphone-free, sensor-only HONEST TECH NOTE iPhone magnetometers measure static and low-frequency magnetic fields. They cannot detect microwave / Wi-Fi / 5G RF radiation. The app reports what the sensor actually sees. FOR ELECTRICIANS · HOME SAFETY · GHOST HUNTERS · INVESTIGATORS · CURIOUS MINDS Available in 14 languages.

The meter was reacting to how you held the phone, not to what was in the wall. A phone's magnetometer reads the magnets inside the phone itself as well as the field around it, and that internal offset can be ten times larger than Earth's field. The app used to cancel it by taking a single reading at startup and subtracting that number. But the phone's own magnetism stays put while Earth's field swings through the phone as you tilt it — so tilting alone moved the reading by as much as the whole scale. Sweeping a phone along a wall is nothing but tilting, which is how bare drywall could show a red "live wire" warning. The app now works out the phone's own magnetism properly, by fitting the shape your readings trace as you turn the device. Turn it slowly in a figure-8 for a few seconds when you start and it will say when it is ready. After that, rotating the phone in an empty room barely moves the number at all, where before it could swing across the entire scale. Also in this update: • Warnings like "live wire" now wait until the calibration is actually good. Until then you see the reading and a neutral "still settling" label instead of a hazard verdict. • If the phone's magnetism changes mid-session — a magnetic car mount, setting it on a speaker — the app notices and recalibrates instead of reporting the change as a field forever. • The guide no longer says the app measures AC magnetic fields. It samples about ten times a second, so 50/60 Hz mains fields, RF, Wi-Fi and radiation are outside what the hardware can do. What it does measure is distortion from ferrous metal, magnets, motors and transformers. • The ICNIRP figures are labelled as reference levels for context, not a compliance verdict. They are the 50/60 Hz public values, and this app measures a static field, which that guidance treats separately.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

1. First observed Aug 18, 2026 · 2:57 AM Free