Research shows that exercise is important for people with Parkinsons disease. This app stimulates people with Parkinsons disease to exercise more. Your steps are measured in the app and your progress on your weekly goal is monitored. You will also be stimulated by a virtual coach.NOTE: The STEPWISE Parkinson app is for participants in the Radboudumc research. If you do not participate in this survey, you will not be able to use the app. For more information, go to https://www.parkinsonnext.nl/stepwise/Functionalities that the app offers:- Todays steps- Steps from yesterday- Weekly goal and progress- Monitor exercise activities- Overview of total number of steps and weekly goals- Chat with virtual coach Bas Bloem- Tips and exercise commands