Google Authenticator has been around for over a decade, is free, and will work with virtually every service that supports ...

How to Add an Account to Google Authenticator You need two things: Google's authenticator app and a code from the account you want to add to the app (Facebook, Amazon, your bank, etc.).

Google Authenticator is one of the most popular options out there -- the app ties directly into your Google Account and is available across Android, iPhone, and the web.

The Google Authenticator app will give you an extra layer of security for your online apps. You can sync your authenticator codes to your Google Account and across your devices.

You may have seen concerning reports this weekend about billions of Gmail accounts being at risk. That isn't the case, but ...

Functionally, Proton Authenticator isn't that different than other popular apps like Google Authenticator and Microsoft Authenticator or alternatives like Duo and Authy.

Like all Proton apps, Authenticator is open-source and has been independently audited and verified by third-party experts. It is available for free on Android, iOS, macOS, Windows, and Linux.