I have exactly 0 choice of banks app that would run on a mobile OS that is neither android or google.

At the end of the day, I need a bank account, and access to it, would it only be for buying food, or paying my mortgage.

If you're in Europe, I saw quite a few comments here saying that banks not requiring the duopoly do exist. Otherwise, a dedicated banking phone might be the way.

Actually, a dedicated banking phone is a good idea for security reasons too. No sure how many people are willing to carry around 2 phones though.

Too bad dual boot is not an option, or VMs.