Open the Safepoint app
Ensure that you are logged into an account
Tap the 'Account' button at the bottom right
Tap 'Security'
Tap 'Change password'
Enter your old password first at the top
Enter your new password
Re-enter your new password at the bottom to confirm
Tap 'Save' once you're finished
Make sure your new password is at least 15 characters or at least 8 characters including a number and lowercase letter. See the Creating a strong password article for password tips and advice.