This study is evaluating a smartphone app called MSCopilot® Detect for people with Multiple Sclerosis (MS). MS is a disease where the immune system attacks the brain and spinal cord, which can cause problems with movement and thinking. The app helps to monitor the disease's progress from home. The study's main goal is to make it easier and more precise to track MS changes, whether from new attacks or slow worsening. It also wants to see if the app can predict when the MS might get worse. Patients will use the app to answer questions about their symptoms every 3 months and do digital tests on their phones. They will visit the study center 4 times over 18 to 24 months. The study will be held in several countries, including the U.S. and Europe, with 314 participants.

• Duration: Up to 24 months, with assessments every 6 months.
• Participation: 4 visits to the study center and regular app use.
• Eligibility: Adults aged 30-65 with certain types of MS, who are stable and can use a smartphone.