WHAT IS IT?
Two of the most popular are Metal Detector by Smart Tools (for Android) and Smart Metal Detector by Netigen (for iOS).Once you've downloaded an app, follow the instructions to calibrate your phone's sensors. Calibration is crucial so the app can accurately detect metallic objects.
WHY IMPORTANT
Have you ever spent an annoying amount of time on the floor searching for a screw or thumbtack that slipped out of your grip? Here's a neat trick: Turn your smartphone into a mini metal detector!
Magnetic field sensors found in most smartphones determine your phone's orientation, but they have another interesting capability — detecting metal objects!
Hold your phone close to the surface you want to scan, like the floor or table, and the app will alert you if it senses metal in the vicinity.
