Kontrollen der Wiener Linien is an Android app designed for travelers and commuters in Vienna. The app retrieves the ticket controls announced on the Wiener Linien's website and displays them in an organized manner. The app does not require a constant internet connection as the data is cached on the user's phone. The announced ticket controls for the upcoming week are always available on Mondays. The app also features a manual refresh of the Schwarzkappler Infos and displays the earlier announced ticket controls.

The app has a home-screen widget that displays the most important data in a compact manner. The widget automatically updates when placed on the home screen and an internet connection is established. The app also provides a statistic of the number of announced ticket controls per line. Future planned features include the automatic update of Schwarzkappler Infos and the comparison of announced ticket controls with actual controls.

It is important to note that the app does not encourage fare evasion and does not provide 100% protection against ticket controls. Overall, Kontrollen der Wiener Linien is a useful app for commuters and travelers in Vienna who want to stay informed about the announced ticket controls.