Look for the WiFi access point.
The app, which displays the WiFi access point nearby.
The image of a radar screen displays the access points and spots. Depending on signal strength, because the position is changed, you know the rough distance to the access point.
Blue radar, you tap the access points and displays information about the access point.
Green radar will display the SSID for each channel will change up or down position depending on signal strength.
This is useful when looking for a free channel.
When you flick the screen left or right to move the radar screens of the two.