Not all, but some do. It is actually every shade of grey with respect to what you try to secure. If it is you cat pictures you probably are fine with just a fin

Not all, but some do. It is actually every shade of grey with respect to what you try to secure. If it is you cat pictures you probably are fine with just a fingerprint scanner on your phone. Want to secure your passwords and accounts, I would at minimum amend that with a proper passphrase or at least a N-digit pin (with N bigger if needed). And also get a proper scanner as most cheap things are notoriously bad. Though it also depends on the attack vector as most biometric 'abuse' is done by people around you and not strangers. In which again; a passphrase is a simple solution.