I don’t want my phone to be implicitly trusted any more than my PC is, however as I have a long master password, it’s really annoying to have to re-enter it every time I want to login to my vault on my phone.
Therefor, I would like to have the opportunity to allow my biometrics to be used in place of a master password when logging in on mobile. In order to maintain security, the app can re-prompt the master password if it sees that the biometrics for a device have been changed (i.e. New fingerprint added, or one removed)