To use the app, a one-time registration is necessary. When registering, you can set your preferences for Halbtax and Class. If the departure location is found by means of locating at the beginning of the journey, a simple wiping movement on the mobile phone is enough to start the app. The color of the app will change to green. During the journey the telephone can be used for other services. At the end of the journey the app is stopped with a new wiping movement, the screen color changes to red and the travel expenses are calculated. If a passenger forgets to check out at the end of his trip, he automatically receives a "Assisted Check Out" after a certain time.
And the best thing to come to the end: The app automatically calculates the daily best price in the continuation of the trip, that is, the maximum of the price of a day ticket - a fair ticket.