you know it's a German city when the public transit

• has multiple apps for no obvious reason and they are trying to market the new one to you rather than like, making it so there's only one
• paying by SEPA direct debit in the app fails
• paying by debit card in the app fails
• the ticket machine is straight out of 2007
• the ticket machine doesn't accept contactless payment
• you should have been a good citizen and used the app that doesn't work so too bad you pay extra for using a ticket machine like some tourist