Stud detector: Stud Finder & stud scanner app work on magnetic sensor emf signal. When the app detects any type of metal wire etc it gives you a signal which means there is something that you want to detect. So for getting the best result make sure your smartphone has an updated magnetic sensor. The stud detector will alert you that if your device does not have a magnetic sensor then it shows a faulty result.
Stud finder: stud detector app and stud scanner app is now available on the play store and it's freely available for everyone then why you are waiting let's download them right now and leave feedback. Your recommendation will be appreciated.