Speed limits do NOT have to be set but are retrieved automatically by the app in real time for the route you are on. Hereby changes in speed limits are directly visible in the app.
SpeedAlert monitors your speed on the highway by comparing it with the speed limit applicable at that moment. As soon as this speed limit is passed, SpeedAlert sends a warning signal. The actual speed is displayed in red and you will hear an alarm sound. This sound can be suppressed via a setting.