It is an augmented reality application that allows us to view magnetic fields, WiFi signals, telephone signal, etc.
Different signals can be seen in different ways, as they can be in the form of spheres or vectors.
The application connects to the phone camera.
Open the app on your phone and with the camera focus on the Wi-Fi device you want to view,
it can be a router, a computer, a smartphone and observe how the different electromagnetic fields are arranged.