Yeah, no. I use real time apps daily. That you are unable to find them only speaks to your inability to find them.
Here is an example.
Anyway. Germany may have real time apps, but you can't plan anything as the timetables don't match real time.
I'd rather have less "real time" apps if the trains adhere to schedule.
I have not made any comment about Germany. My comment is about DB. Tell me about DB. We are not talking about apps.