When the plate inside the stud finder is over wall board it will sense one dielectric constant sort of like an insulating value. The circuit in the stud finder can sense the change and reports it on its display.

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How does a stud finder app work. How does a stud finder app work. It works on a capacitance differential generated by density difference. Pro metal detector does not just make a sound or signal a light bulb that behind the plaster is a nail. This app will help you detect ferrous metal objects. Any stud finder will work well however they all work differently. Download stud find metal detector and enjoy it on your iphone ipad and ipod touch.
Some of the older ones rely on magnetometers and some use impulse radar which is great for contractors who need to find studs underneath several layers of material. The application stud finder. This is a free app that works without any restrictions. Download stud finder and enjoy it on your iphone ipad and ipod touch. It uses the magnetometer to measure the magnetic field when your iphone is placed near ferrous metal objects. When pointed at an empty wall the sound takes longer to bounce back than it does when it is in front of a stud.
However there are a couple of things you need to do to get precise results. Basically the radar in the stud finder shoots out a radio wave that bounces back once it reaches an object. How the walabot stud finder app works a standard wood stud finder works by sensing density changes inside walls. Nail detector use your iphone to find nails in wooden support beams within your wall or any sort of magnetic metal hidden from view. You can find and see the location of wires pipes and other communications on your phone screen. But when it is over a stud the dielectric constant is different.
Take everything off the wall pictures shelves or other pieces of furniture that can impede you. There is nothing complicated about using an application for finding a stud.