@QuadRadical among others, BankID (was broke at some point but fixed later) which I need to identify myself when signing in to banking, tax, and health-related services - Faster BankID (as linked to) doesn't work though probably due to an unlocked bootloader.
The "Coopay"-function in the Coop app (Scandiavian grocery chain).
There was also one or two apps that didn't allow opening with fingerprint instead of code - though this seems to be due to bad code as it worked other places.