Change your Yahoo password on an iOS device Start from the Yahoo mobile app Launch the Yahoo app Tap to open the sidebar Scroll to the bottom of the sidebar Tap Account Info Now you're on the Personal info screen Tap to open the sidebar Tap Account security Tap Change password Enter a new password Your new password must be between 8 and 32 characters long It cannot be a single character repeated and cannot contain your name or your Yahoo ID It cannot be the same as or similar to a password you've used before Don't use the same password that you use on another site! Re-enter your new password Tap here any time to see what you're typing Success! You've changed your password Never share your password with anyone! Use your new password for all Yahoo products Don't forget to update your password in other places it's stored, such as your smart phone's mail app