Wall Stud Magnetic Detector is a free iPhone app developed by Gregorio Bello. This utility and tools app is designed to help users quickly detect wood studs hidden under walls, drywall, plasterboard, or stucco. Using your device's compass (magnetometer) sensor, this app precisely pinpoints metal studs, nails, screws, and other metal fasteners embedded in all wooden wall studs.

Similar to other handheld stud detector tools, Wall Stud Magnetic Detector operates by moving your device along the wall. As you move, the needle on the app's interface will move, and a beep will indicate the presence of a stud. The app's compass sensor detects subtle changes in the background magnetic fields caused by the conductive metal fasteners in wooden studs.

Key features of Wall Stud Magnetic Detector include an automatic sensor that measures the magnetic field in uT, an active detection beep, and the ability to store the time when a stud is detected. This app is a handy tool for anyone involved in construction or DIY projects.