Metal Detector is a practical Android application designed to detect nearby metal objects by measuring the magnetic field value through the device's built-in magnetic sensor. The app displays the magnetic field level in microtesla (μT), allowing users to identify metal objects in their vicinity. It provides a simple user interface where users can monitor fluctuating magnetic field levels as they move their device around, with visual indicators and sound alerts for nearby metal detections. The app is versatile, allowing uses such as locating electrical wires in walls and detecting hidden devices.

In addition to its core functionality, Metal Detector offers customizable settings for vibration and sound effects, enhancing the user experience. The app supports multiple languages, making it accessible to a wider audience. It is important to note that the effectiveness of the app depends on the smartphone's magnetic sensor, and it cannot detect non-ferrous metals like gold or silver. Overall, Metal Detector serves as a useful tool for various applications, from practical detection tasks to fun activities.