This is the main screen of the application.

Your position is indicated by the blue dot in the middle of the screen.
The blue circle represents a radius of 1 mile around you (1km if you are using metric units).
You can see that there's a fixed speed camera ahead.
At the bottom of the screen ,you can see the buttons to signal a camera in your direction, in the opposite direction or to signal a radar that is gone.
At the top , you can see your speed and the distance to the nearest speed camera in your direction.
When signaling a camera, you will be prompted for its type.
If you want so spare your battery life a bit, you can also use the radarscreen.
On this screenshot, you can see that Speed Cam Hunter spotted a talivan.
You can also use Speed Cam Hunter in Landscape mode.
On this screen, there is a speedtrap ahead: a mobile camera has been reported many times and caution is advised.