Öffi.at offers fast, mobile access to the real-time data of the Wienerlinien. You want to find the fastest route between two points in Vienna using public transport? Or are you interested in the departures at a station or a line? Here you will find what you are looking for.
Frequently used routes, lines or stations can even be saved as favorites.
The site is designed specifically for the needs of mobile browsers and its use is completely free.
Have fun exploring!