Metal detection relies on your phone's built-in magnetometer sensor. Some devices don't include one, in which case detection features won't work. Try moving a magnetic object (like a fridge magnet or steel spoon) near the top of your phone to confirm the sensor is responding, and calibrate your device by moving it in a figure-8 motion.
No. The app measures magnetic field changes only. It is not a professional metal detector, cannot detect buried or underground objects, and does not identify or verify gold, silver, gemstones or other precious metals. It is intended for entertainment, education and basic magnetic-field measurement.
Magnetometer accuracy depends on your device model and nearby interference. Keep away from other electronics, magnets, metal furniture and phone cases with magnets. Recalibrate by moving your phone in a figure-8 pattern, and adjust the sensitivity slider to suit your environment.
Only the optional camera-overlay feature uses the camera, so you can watch magnetic-field changes over a live view of your surroundings. Camera images are shown on screen only — we do not record or upload them. You can decline or revoke this permission at Settings → Apps → Metal Detector: EMF Scanner → Permissions; the detector still works without it.
Sensor readings are processed on your device and are not uploaded to us. The app is free and ad-supported, so advertising and analytics partners (Google AdMob, Google Firebase, Adjust) process device identifiers such as your Advertising ID. See our Privacy Policy for full details.
Where the consent prompt appears, choose "Manage options" to select non-personalized ads. You can also reset or delete your Advertising ID at Settings → Privacy → Ads on your Android device.
Make sure sound alerts are enabled in the app settings, your media volume is turned up, and your detection threshold isn't set too high for the current environment. Lower the threshold or increase sensitivity to trigger alerts sooner.
The app stores settings locally on your device. Clearing app data (Settings → Apps → Metal Detector: EMF Scanner → Storage → Clear data) or uninstalling the app removes local data. To request deletion of any data held by our analytics/attribution partners, email us at the address below.
Email our support team and we'll get back to you within 1–2 business days.
devapp.aero+metaldetectoremfscanner@gmail.com
See also our Privacy Policy and Terms of Use.