Radiation Detector: EMF Meter

smartpeopleapps

About this app

Radiation Detector : EMF Detector: measure magnetic fields with your phone

EMF Detector turns your phone's built-in magnetic sensor into a simple electromagnetic field meter. Point your phone at an appliance, a cable, or a wall, and watch the reading change in real time.

What the EMF meter shows you

• Live magnetic field strength in microtesla (µT) and milligauss (mG)
• A moving graph so you can see changes as you walk around
• Peak-hold, so you can find the strongest spot in a room
• Adjustable alert level with sound or vibration when the field rises above it
• Saved readings with time and location, so you can compare rooms or days
• Flashlight and dark mode for scanning in low light

What people use an EMF detector for

Around the house — Compare the magnetic field near a microwave, router, fridge, speaker, TV, or charger. See which spots in your home read higher and which read lower.

Finding wiring and metal — Live cables, junction boxes, transformers and steel studs all disturb the magnetic field. Sweep a wall and watch for a rise.

Ghost hunting and paranormal investigation — A staple tool for paranormal groups. Log readings during an investigation and review them afterwards.

Curiosity and learning — A hands-on way for students to see that electromagnetic fields are real, measurable, and everywhere.

Built to be simple

One screen, one big number, no setup. Open the app and it starts reading. Calibrate with a figure-eight motion whenever the compass drifts.

Please read: what this app can and cannot do

This app uses the magnetometer (compass sensor) already in your phone. That sensor measures magnetic fields only.

It cannot measure ionizing radiation. There is no Geiger counter, no gamma or beta detector, and no dosimeter in a phone, so this app does not report µSv/h or any radiation dose. Any app claiming to do that on a standard phone is not measuring anything real.

Readings are not laboratory-grade. Accuracy depends on your phone's sensor, and results will vary between devices. This app is for general interest, hobby use, and education. It is not a safety device and must not be used to assess health risk. For that, use a certified meter or a qualified professional.

Requires a device with a magnetometer. Most modern Android phones have one — the app will tell you at startup if yours does not.

Free, works offline, no account needed.

Ratings and reviews

Best app for radiation detection from Android phones.

Best and accurate.

it's kinda scary to know how much radiation there is on stuff

What’s new

Multiple languages support functionality Implementation.