Keep On Keep Up for Parkinson's

The goal of this mixed methods, user research study is to evaluate the Keep On Keep Up programme for people with Parkinson's (KOKU4PD). The main aims of the study are to: 1. To explore the usability and acceptability of the PD specific KOKU programme from a user and health care professional perspective. 2. To produce a KOKU4PD digital program that is ready for National Health Service (NHS) approval and a future effectiveness evaluation. Participants will use the KOKU4PD app at home for 4 weeks. They will be assessed at baseline and after the 4 weeks to measure aspects of their disease status, mobility, thinking, mood and quality of life. They will also be asked to complete some questionnaires about the usability of the app.