EMF Meter | Metal Detector and Magnetic Field App for Android and iOS (Flutter)

EMF Meter: A complete metal detector & magnetic field app compatible with Android and iOS, ready to publish

EMF Meter turns any phone’s built in magnetometer into a polished magnetic field and metal detector. It is a finished, real world utility app built on a single modern Flutter codebase that ships to both Android and iOS. Buy it once, change a few values, build, and publish your own app to the Google Play Store and Apple App Store. No backend to host, no monthly services to pay for, and a simple guide that walks you through every step.

Live demo / APK: Download the demo APK

Why developers choose EMF Meter

• Launch fast. A finished, good looking utility app. Reskin and publish instead of building from zero.
• One codebase, two stores. The same Flutter project builds your Android app and your iPhone app.
• No backend, no ads, no Firebase. Everything runs on the device. Nothing to host and no surprise bills.
• Easy to make your own. Change the name, app ID, icon, colors and text by editing plain, clearly organized files.
• Documentation anyone can follow. A clear HTML guide takes someone with no coding experience from install to a signed store build.

Developer highlights

• Ready to Publish & Easy to Reskin: Open it in Android Studio or VS Code and make it yours in minutes — change the app name, package / bundle ID, launcher icon, and the single accent color in one file (app_colors.dart), plus every on-screen string across 15 translations. Then build a signed Android App Bundle and archive the iOS app — store-ready.
• Lightweight & Dependency-Light: No ads, no Firebase, no analytics and no push SDKs. The Pro-Instrument gauge — radial dial, tick marks, needle and glow — is drawn at runtime with Flutter’s CustomPainter instead of heavy image assets, keeping the build clean and lean.
• Android & iOS SDK Compatibility: Built on a modern Flutter (Dart 3.11+) toolchain. Runs on Android 7.0+ (Minimum SDK 24) and iOS 15.5+ from one shared codebase, covering the vast majority of active devices.

Key features

Detection & instruments

• Three detector modes — EMF Meter, Gold Finder and Silver Sensor — each with its own accent theme.
• “Pro Instrument” dashboard: a live radial dial with the reading in the center, a color graded arc and a peak hold marker.
• Live statistics: Now, Average, Peak and Δ (disturbance above the calibrated baseline).
• Baseline auto calibration with a one tap Recalibrate button to zero out the ambient field.
• Real time line graph of magnetic field strength over time.
• Unit switch between microtesla (µT), milliGauss (mG) and Gauss.
• Adjustable sensitivity and a custom beep threshold with sound and vibration alerts.

More tools & screens

• Camera Scanner with a live scan overlay.
• Digital Compass with multiple selectable themes.
• Home grid with 6 tiles, an onboarding flow, a “How to Work” guide and a full Settings area (About, Terms, Privacy, FAQ, Share and Rate).
• 15 languages included out of the box.
• Sleek dark-mode UI with an Electric-Cyan accent and a custom gauge logo.

What you can change in minutes

• App name and ID (package / bundle identifier) for both platforms.
• App icon, splash and launch screens for both platforms from one source image.
• Colors and theme in one Dart file (single accent color).
• All on screen text and the 15 translations.
• Contact email, privacy policy and terms links.

What you get

• Full, clearly organized Flutter source code for the complete app.
• Android and iOS projects ready to build.
• A clear HTML documentation guide written for any skill level, covering setup, customization, signing keys, and publishing to both stores.

Please note (be honest with your users)

EMF Meter uses your phone’s magnetometer to measure static / low-frequency magnetic field strength (in µT). It is great for detecting ferrous metal, magnets and DC magnetic fields. It does not measure RF, microwave or household-AC “radiation,” and it is intended for entertainment and basic detection, not as professional measuring equipment.

Stay updated

This is an actively maintained item. Every update is documented in the changelog, and updates are free for existing buyers.

If EMF Meter helps you ship your app, please consider leaving a 5 star rating. It means a lot and helps us keep improving the product. Thank you for your support.