Blockstore encrypted credential storage
The Blockstore API lets apps save user credentials without the complexity or security risk associated with saving user passwords.
Smart Lock for Passwords
Programmatically save and retrieve credentials, and automatically sign users in across devices and websites with Smart Lock for Passwords.
Autofill on the device
Enable forms on apps to use the device's autofill utilities.
Enable forms on web pages to use the browser's autofill utilities.