[iMore Question]

I'm using keychain when I log in to sites on Safari, and it works well, but when I have to log in to an app on my phone or iPad I've never gotten the prompt to save and auto fill. Is there a way to use keychain for the app logins? Thanks.

[Just_Me_D]

No. iCloud Keychain keeps your Safari website usernames and passwords, credit card information, and Wi-Fi network information up to date across all of your approved devices that are using iOS 7.0.3 or later or OS X Mavericks v10.9 or later.iCloud Keychain can also keep the accounts you use in Mail, Contacts, Calendar, and Messages up to date across all of your Mac computers. If you sign in to Facebook, Twitter, Linked In, or any other accounts in Internet Accounts on OS X Mavericks, iCloud can push those accounts to your Mac computers as well.

Source: https://support.apple.com/en-us/HT204085