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.

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.