Follow these steps to change your Apple ID password.
On your iPhone, iPad, iPod touch, or Apple Watch
Tap Settings > [your name] > Password & Security.
Tap Change Password.
Enter your current password or device passcode, then enter a new password and confirm the new password. Forgot your password?
Tap Change or Change Password.
Sign in with your new Apple ID password to access Apple features and services.
Learn more about how to change your Apple ID and update other account information.