Personally I find the website layout terribly confusing. An App could address that. They seem to be easy to get, do and have.
Here's the response I received from Support:
"Thank you for contacting MyParkinsonsTeam.
We do not have a mobile app for the site yet. We recommend you use the web browser to view www.myparkinsonsteam.com from your phone or device.
Best,
Christine
MyParkinsonsTeamF.A.Q: https://myparkinsonsteam.zendesk.com/hc/en-us"