The iPad, iPhone, and Mac have a free password manager called iCloud Keychain. iCloud Keychain is built right into the iOS and macOS, that stores all of your sensitive logins with encryption and biometric authentication that syncs across all of your Apple devices.
How to use iCloud Keychain as a password manager through iOS
Continue with your TouchID
Tap different URLs or applications to view its correlating username, password, and security recommendations.
You can also change passwords under security recommendations or delete the password from your iCloud Keychain altogether. Deleting the password will not effect your data from it's original site or your account within that site.
How to use iCloud Keychain as a password manager on macOS
Unless you've already enabled keychain on macOS, this is how to initially set it up to view your passwords.
Open System Preferences
Click Apple ID
Enter your Apple ID and password
Enter a 6-digit verification code used to set up Keychain on another device
Enter the security code again
Enter a reliable phone number that can receive text messages. This will be used to check your identify whenever you access keychain.
Viewing your passwords on macOS
Click Preferences under the Safari drop-down menu on the top left
Enter your Mac password (this is not your Apple ID password)
A list of accounts and URLs will be listed on the left side of the menu. You can now click any of these sources to view the account's username and password.