EMFD reads the magnetometer built into your phone and turns it into a precise instrument — for wiring and appliances, hidden magnets and metal, and a little after-dark fun. Honest about what it measures, and what it can't.
Your iPhone has a magnetometer — a genuine sensor for magnetic fields. It does not have an antenna for measuring Wi-Fi or 5G. Apps that show "radiation" from those are inventing numbers. EMFD measures what the hardware can actually measure, and says so up front.
A precise, no-drama gauge with a reference scale that turns raw microtesla into meaning. Calibrate with a figure-8, run a Guided Home Check, record sessions, export a clean PDF. Built for answers, not anxiety.
A cinematic K2-style lamp bar that flares as the field shifts around you, four anomaly levels, eerie skins and a shareable Activity Score. Pure entertainment — and ridiculously fun to film. It claims nothing beyond the fun.
Glide the phone over cameras and lenses — the magnets inside push the reading up.
Speakers, chargers, microwaves, motors — every live device lifts the needle.
Magnets, nails and wiring inside walls — follow the spike to find them.
Worried about a spot in your home? Don't guess. The Guided Home Check walks you through it room by room and hands you a reference report you can keep — or export as a PDF.
Real-time magnetic flux density, straight from the magnetometer.
Turns raw μT into meaning against Earth's natural field.
Cancels the offset from cases and magnets in seconds.
Capture and replay a hunt; export the data as CSV. Pro
Export a clean Home Check report to keep or share. Pro
Six eerie palettes for the K2 lamp bar. Pro
No location, mic, camera or contacts. It needs none of them.
No account, no analytics, no cloud. Everything stays with you.
EMFD has no account, no analytics, no ads and no third-party SDKs. Your readings never leave the phone unless you choose to share them.
The free app is a fully usable, ad-free meter. Pro adds recording, exports, unlimited reports and every skin.
One payment. Yours forever, on your Apple ID. No subscription.
Prefer to try first? Start with a 3-day free trial.
Just here for a Halloween week? Unlock Pro for the season.
Current prices are always shown in the app before you buy. Payment is handled by Apple.
EMFD