The app is a different platform than the Pro Portal with much of the same functionality. You can use the app to connect with referrals, call and message them directly, make first contact, use text templates, add notes, and update lead statuses from both mobile and desktop.
Tasks like paying fees, adding team members, and updating your profile will need to be done in the Pro Portal.
At this time, the app is only available for iOS Phone users, but Android access is coming soon.