# Magnetometer

> Measure magnetic field with phone sensor in μT

Canonical page: [https://chrome-stats.com/d/com.tooltoolnam.magnetometer](https://chrome-stats.com/d/com.tooltoolnam.magnetometer)

## Overview

- **ID:** `com.tooltoolnam.magnetometer`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** ToolToolNam
- **Category:** TOOLS
- **Downloads:** 798
- **Version:** 1.0.6
- **Last updated:** 2026-09-03
- **First published:** 2026-05-05
- **Publisher country:** KR
- **Size:** 20 MB
- **Data as of:** 2026-09-13
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.tooltoolnam.magnetometer)
- **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 pocket magnetometer.<br><br>This magnetometer reads the built-in magnetic sensor and shows the surrounding magnetic field strength in microtesla (μT). See X, Y, Z axis values and the total field at a glance, with a live mini chart so you can spot changes the moment they happen.<br><br>★ Three modes in one app<br>• Measure — total field, per-axis values, live history graph<br>• Metal Detector — set a baseline, get a vibration alert when nearby metal shifts the field<br>• EMF — quick reading classified as Normal, Slightly High, or High based on the 25–65 μT Earth-field range<br><br>★ Useful for everyday checks<br>• Find nails, screws, rebar or hidden wires before drilling into a wall<br>• Test if a magnet, speaker, or motor is producing a strong field<br>• Compare appliances near your bed, desk, or workspace<br>• Verify if a &quot;neodymium&quot; magnet is actually strong<br>• Curiosity, school science, geomagnetism class<br><br>★ Designed to stay out of your way<br>• Clean Material 3 interface, light and dark theme<br>• 37 interface languages<br>• Measurement runs on-device<br>• No account required<br><br>★ Important to know before using<br>• Detects ferrous metals — iron, steel, nickel. Aluminum, copper, brass, gold typically do not register.<br>• A magnetic phone case (MagSafe, magnetic mounts, wallet rings) sits right next to the sensor and will skew readings. Remove the case for accurate measurement.<br>• Sensor accuracy varies by phone model.<br>• This app is a reference tool. It is not a replacement for professional EMF meters or stud-finders used for safety, medical, or industrial work.<br><br>If your phone does not have a magnetic sensor, the app will tell you on launch.<br><br>Try Magnetometer the next time you want to know what the magnetic field around you actually looks like.

## Rankings

- #1,227,294 — 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.magnetometer.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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