I've found Apple Maps to usually be terrific with public transit -- with the caveat that they don't have transit data for nearly as many cities as Google does. For a while I considered Apple to be slightly ahead of Google, as Apple's system could tell you which exit from transit stations to take when you were walking/transferring, although I believe Google's caught up with that since.

Crap for Munich at least. Just tried it, couldn‘t even find the route between home and work - and both are along major public transport routes. However, I typically use the DB Navigator app for these purposes in Germany. Highly recommended.