Bitwarden Authenticator is a standalone app that is available for everyone, even non-Bitwarden customers.
In its current release, Bitwarden Authenticator generates time-based one-time passwords (TOTP) for users who want to add an extra layer of 2FA security to their logins.
There is a comprehensive roadmap planned with additional functionality.
Available for iOS and Android
Is there a good reason I don’t know about to prefer this over Aegis?
No, they’re both ostensibly open source and standalone. I’m an avid Bitwarden Free user, but Aegis has been my go-to for a long time.
If it’s a standalone completely offline app, like Aegis, I’m at a loss to what they could offer that is any different than what Aegis already offers.