Glioblastoma Remote Monitoring and Care - Research Protocol

This trial is evaluating whether Apple Watch-based remote monitoring can help doctors track symptoms and health changes in people with glioblastoma — an aggressive brain tumor — during treatment or surveillance, allowing for earlier interventions. **You may be eligible if:** - You are 18 or older with newly diagnosed or recurrent glioblastoma - You are currently undergoing treatment or active monitoring for your brain tumor - You have a Karnofsky Performance Status of 70% or higher (meaning you can care for yourself and perform normal activities) - You can give informed consent - You or your caregiver has an Apple iPhone **You may NOT be eligible if:** - You are under 18 - You cannot give consent due to significant speech or language problems (aphasia) - You have tattoos or skin conditions on your wrist/forearm where the watch would be worn - You cannot tolerate wearing an Apple Watch for at least 12 hours a day on most days - You don't have access to an Apple iPhone Talk to your doctor to see if this trial is right for you.