Password AutoFill makes using a password manager on your iPhone or iPad dramatically easier. The new OS 12 update allows you to auto-complete login screens using third party apps for the first time.
That means opening a password form and finding your username and password already entered. No more typing in, and no switching between apps and copy-and-pasting passwords.
AutoFill using a third party app also allows you to seamlessly jump between your devices. For instance, having a password manager installed in a browser on your Windows computer that syncs to your iOS device.
Password AutoFill is a big deal
A significant barrier to better account security is ease-of-use. A difficulty of strong passwords and password managers is simply using them because of their complexity. On mobile, this has resulted in having to go to a online service, switching to your password manager app, copying the username and pasting it in the service; then repeating the process for the password.
Password AutoFill is smarter.
Here is how it works using LastPass (no audio):
Compatible third party password managers include LastPass, Dashlane and 1Password. Apple's integrated iCloud Keychain also works with the feature.
In practice, Password AutoFill occasionally does not detect a login in form and will not suggest entering your username and password. A quick work-around is to select the password field first, AutoFill should then detect the form and complete both fields.