Metal stud detector is a useful tool to detect the metallic things or stud that is not visible e.g. behind the wall. You can use it as a hand held real metal detector. During the repairing and plumbing it is challenging to detect metal for repairing purpose of walls and water leakage. Sometimes for your daily needs metal finder is a very useful app.

It actually works by using the compass of your device (magnetometer) to accurately target studs by pinpointing plasterboard, metal conducting fasteners, screw, nails, joist etc.