It’s time for me to move from SMS to a 2FA Authenticator app. I want something that will be open source but also ridiculously easy to back up, transfer to a new device, or replace if it is on a device that fails. I want it to be versatile enough to use across all necessary authentications. I also want to be sure that I can use the same app for many many years. I don’t want it tied into another service.
What’s my best option?
Make sure that it can be backed up, somehow.
Save your recovery codes in an organized and secure fashion.
Offhand, Ente does backup I believe.
Bitwarden does export (save on encrypted drive, or print and put in safe deposit box)