If you switch on two-factor authentication (2FA) on your accounts—and you really should—then you need something else besides a username and a password when you log in on a new device. That’s where a good authenticator app comes in.

https://gizmodo.com/the-best-authenticator-apps-for-protecting-your-account-1840711013?utm_medium=sharefromsite&utm_source=gizmodo_twitter