This app is an accurate magnetometer that provides the magnetic field strength in micro-Tesla (µT) units.

The sensor in this app can detect the magnetic field in the range of 10µT to 10mT. It can be used for a variety of purposes. For example, you can use it to measure the magnetic field strength in nature. 

To use this app, you will need to provide your Android device with a magnetometer sensor. 

If your device is not equipped with a magnetometer sensor, you will not be able to use this app. To check if your device has a magnetometer sensor, you will need to go to your device's Settings and find the Device Compatibility section.