Authy

Using two-factor authentication is one way to better secure your website logins. And Authy can make the process easier by letting you authenticate on your Apple Watch.

First, you must enable two-factor authentication for each website you want to add to the app and choose the option to use an authenticator app. Using Authy on your iPhone, you then set up your accounts for each site by scanning a QR code or manually entering a key.

The app supports thousands of different sites and services, including Gmail, Microsoft, Apple, Yahoo, Facebook, Twitter, Dropbox, and Amazon.

The next time you sign into one of those sites, you’ll be prompted to enter your password and then enter the security code generated through Authy. If your iPhone isn’t handy, you can instead turn to the Apple Watch app, where you just tap the account and enter the generated code number.