Google Authenticator isn't bad, it's just that Bitwarden Authenticator is better.

I use Authy. However read past problems it may or may not of had. It is compatible with the Google Authentication algorithm with is a time based password system. I picked it over Google Authenticator ...

None ...

Authenticator apps are increasing in adoption as they add another layer of security to user identity verification. An ITRC study found that more than 1.35 billion individuals had their personal data ...