If a parent is able to access the PowerSchool website: https://haverfordsd.org/public, but can't log into the PowerSchool mobile app with the same username and password.
Open the PowerSchool app
Select District Code in the upper left corner of the screen
Select Where's My District Code?
Select Enter Server Address
Server Address: https://haverfordsd.org/public Continue (on the keypad)
District Location Pop-up window --> Is your school district in Canada --> Select No
Login with existing username and password