If you are traveling to Switzerland, you must get a Swiss Rail pass. We chose the flex option for 8 days which allowed us to ride the trains, trams, ferries whenever we wanted. The SBB Mobile app is absolutely incredible and so so easy to use! It clarifies which platform, which train station, and the correct time table. But be sure to refresh the app 5-10 min prior to your arrival at the train station in case the platform locations will change. It happened to us several times during our trip. Of course, if we were going to a nice dinner we would Uber where it was available.