Metal Detector is easy to use and an extremely useful app for your android mobiles. If you want to detect the presence of any metal around your phone just trigger the app and it will immediately tell you if any metal are present in your surroundings.
Metal detector uses the magnetic sensor (built-in your mobile device) and shows magnetic field level in μT (microtesla). The magnetic field level (EMF) in nature is about 49 μT (micro tesla) or 490 MG (mile gauss); 1μT = 10mG. If any metal is near the value of magnetic field will increase and the app will vibrate and beep to warn the user.
Make sure you are not around your computer TV or Other electronic devices which can interfere with the readings of the magnetic sensor making Metal detector less powerful that it can be.
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Uses:
Launch application on your mobile and move it around. You will see that the magnetic field level shown on screen is constantly fluctuating. Colorful line shows the value of magnetic field level (EMF). The chart will increase and the device will vibrate and makes sounds announcing that metal is near.

Note:
Not every model of smartphone has a magnetic field sensor. If your device does not have one the application will not work.
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