Field Scanner Pro aids in scanning your everyday environment for potentially harmful magnetic fields using the built in magnetic sensor in your phone. This app thus aims to raise the awareness of such magnetic fields and help locate their sources. Common sources include power transformers, electro-magnets (e.g. speakers) and fields resulting from electrical currents.——* Features auto-logger* Export log-data to external storage device* Adjustable sensitivity* Stay Awake functionPlease make sure to check out our other professional apps:? Compass Pro – Clean and Precise Digital Compass