Metal Sensor is a utility tool for Android devices that utilizes the built-in magnetic sensor to measure magnetic field levels. It is designed to detect metal objects, making it useful for a variety of practical applications. The app operates by measuring the natural magnetic field, which typically registers at around 48μT. When metal or magnetic substances are nearby, this reading will increase, indicating their presence.

This app can assist users in identifying hidden cameras, spy devices, coins, treasures, and lost electronic products. However, it is important to note that the app may not accurately detect nonferrous metals such as gold and copper coins. Additionally, users should ensure that their smartphone is equipped with a magnetic sensor for the app to function properly.