Authenticator apps auto-generate numerical codes to help secure your online accounts. These codes act as a form of 2-factor authentication (2FA). Here are some of the best authentication apps ...

Proton Authenticator offers end-to-end encryption Authenticator apps are hard to crack for hackers as they generate codes locally on your device, and each code has a life of just 30 seconds.

In addition to storing your passwords and login credentials, the Passwords app can also generate verification codes for additional sign-in security.