Welcome to the new EMF detector app - Emf reader. EMF Detector stands for electromagnetic field. So EMF detector means to detect electromagnetic fields. It finds an electromagnetic field by using a magnetic sensor. Emf detector for android use this simple app to detect electromagnetic fields & devices and amaze your friends with what your phone can do. Watch out because some people believe that sudden changes in the EM field might indicate the presence of paranormal entities. Emf detector for an