EMF - Magnetic Field Detector is a free Android app developed by kalemluyrr. This app allows you to use your phone as an object detector or a radiation detector to measure magnetic fields. With the hidden objects detector, you can detect objects using the infrared viewer, which is capable of detecting infrared light that is invisible to the naked eye. The app also includes features to test your phone's speakers, microphone, WiFi, LCD, flashlight, black screen, and vibrations. Additionally, the compass feature helps you find directions in any direction.

The app utilizes the phone's magnetic field sensors to detect electromagnetic fields, providing EMF readings in both analog and digital meters. However, please note that the accuracy of the readings depends on the quality of your phone's sensor. Phones without magnetometers are unable to display EMF readings.

Overall, EMF - Magnetic Field Detector is a useful app for detecting objects, measuring magnetic fields, and testing various features of your phone.