This application is used to detect Electromagnetic field. This can also be used as an metal detector. This application uses the magnetic sensor inbuilt in the application. it Displays EMF is Micro Tesla . Shows a graph and and X Y Z vectors.note : The accuracy depends entirely on the sensors in your device. Note that the magnetic sensor is affected by electronic equipment (TVs, PCs, etc.) due to electromagnetic waves. This is not a bug in the app. If this app does not work properly, it may mean that your phone's sensors are damaged, broken or non-existent. To initialize the sensors, point your phone up towards the sky and move it in a figure 8 pattern. keywords : ELECTROMAGNETIC FIELD SENSOR, METAL DETECTOR,ghost FINDER,MAGNETIC SENSORAnd its FREE!!Please provide rating if possible.Upcoming feature : Separate X Y Z graphs