# Metal Detector: EMF Gauge

> Find metal with your phone — big gauge, beeping alerts and vibration

Canonical page: [https://chrome-stats.com/d/com.tooltoolnam.metal\_detector](https://chrome-stats.com/d/com.tooltoolnam.metal_detector)

## Overview

- **ID:** `com.tooltoolnam.metal_detector`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** ToolToolNam
- **Category:** TOOLS
- **Downloads:** 700
- **Version:** 1.0.3
- **Last updated:** 2026-08-27
- **First published:** 2026-08-04
- **Publisher country:** KR
- **Size:** 21 MB
- **Data as of:** 2026-09-12
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.tooltoolnam.metal_detector)
- **Website:** [https://tooltoolnam.github.io/](https://tooltoolnam.github.io/)
- **Privacy policy:** [https://tooltoolnam.github.io/tooltoolnam-privacy/privacy-policy.html](https://tooltoolnam.github.io/tooltoolnam-privacy/privacy-policy.html)

## Description

Turn your phone into a metal detector. Metal Detector reads your phone&#39;s built-in magnetic sensor and shows nearby metal on a big analog gauge — the needle climbs, the beeping speeds up, and the phone vibrates harder as you get closer.<br><br>Sweep your phone slowly over a surface. When metal comes near, the magnetic field around it is disturbed, the needle jumps, and a large METAL DETECTED alert appears on screen.<br><br>KEY FEATURES<br>▸ Large analog gauge with a smooth moving needle<br>▸ Beeping that speeds up as the signal gets stronger (Geiger-counter style)<br>▸ Vibration feedback that grows with the signal<br>▸ One-tap calibration to zero out the background field<br>▸ Sensitivity slider — from strong metal only to fine wires and small nails<br>▸ Signal levels: Weak, Normal, Strong and Very Strong<br>▸ Detection log that records when strong signals were found<br>▸ Field strength in µT for those who want the raw number<br>▸ Light and dark themes<br><br>WHAT PEOPLE USE IT FOR<br>▸ Treasure hunting games in the yard or at the beach<br>▸ Camping and outdoor trips<br>▸ Finding nails, screws, coins and keys<br>▸ Checking for wiring or pipes behind a wall before drilling<br>▸ Playing detective with the kids<br>▸ Satisfying plain curiosity about what is hidden nearby<br><br>CALIBRATION MAKES IT WORK<br>Hold the phone still, away from metal, and tap Calibrate. That sets the current magnetic field as your zero point, so the Earth&#39;s own field and any fixed metal nearby are cancelled out. Only new, local disturbances register as a signal. Recalibrate whenever you move to a new spot.<br><br>PRIVATE BY DESIGN<br>Everything runs on your device. No location is collected, nothing is uploaded, and no internet connection is required to detect.<br><br>IMPORTANT — HOW IT WORKS<br>Metal Detector estimates nearby metal using your phone&#39;s built-in magnetic (magnetometer) sensor. It detects changes in the magnetic field and cannot replace a professional VLF/PI metal detector. Readings are affected by speakers, magnetic cases, other electronics and vehicles, and non-magnetic metals such as stainless steel and aluminum may respond weakly or not at all. Sensor quality varies between phone models.<br><br>Supported by ads.

## Rankings

- #1,269,541 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.gms.permission.AD_ID`
- `com.tooltoolnam.metal_detector.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.tooltoolnam.metal_detector)