Weirdly Commerzbank Banking App rejects logins approved by a rooted phone so I cannot login with my LOS phone. Comdirect is literally the same company but a purely online product. It is so stupid. I also use INGDirekt and it works.

In this comment I mentioned N26 and Scalable Capital also works with a custom ROM: https://news.ycombinator.com/item?id=42560775