Using MagnoSpectre
To get the best results with MagnoSpectre, place your phone completely still on a surface. Remove any magnetic phone cases or cards with magnetic strips from the area. Do not place the phone near other electronic devices that may distort the magnetic field.
It's recommended to activate airplane mode to ensure the device itself does not interfere with the magnetic readings. The app remains completely silent to help you focus on other sounds around you and possibly capture EVP (Electronic Voice Phenomena).