IOS Device:

Safari AutoFill Passwords is the feature that can automatically save and update your passwords on iPhone and iPad as well as offer to create automatic strong passwords when signing up for new accounts online.

It’s also end-to-end encrypted with iCloud Keychain.

1. On your iPhone or iPad, open the Settings app.
2. Swipe down and choose Passwords.
3. Tap AutoFill Passwords at the top.
4. If not already turned on, tap the toggle next to AutoFill Passwords.
   1. If you have a third-party password manager installed you may see the option to allow filling from multiple sources (e.g. 1Password, etc.) along with Apple’s iCloud Keychain.
5. Now when you log in to accounts, websites, etc. your iPhone will ask if you’d like to AutoFill, save/update or auto create a new password.
6. Also consider using Sign in with Apple or Sign in with Google/Facebook/Twitter etc. when creating new accounts as it means you don’t have to create another unique login and is a more secure way to manage your credentials.

Also, if you’d like to save your passwords from iPhone to your other Apple devices, make sure to head to the Settings app > Your name > iCloud > Keychain > toggle on iCloud Keychain.
 

Android Device:

If you enter a new password on a site, Chrome will ask to save it. To accept, tap Save.
If you sync in Chrome:

1. On your Android phone or tablet, open Chrome.
2. At the top right, tap More .
3. Tap Settings …> Password Manager.
4. On the right of the search bar, tap Add +.
5. Enter the website, username, and password.
6. At the top right, tap Save.