SpinePal Open Pilot

SpinePal is a self-guided digital intervention developed for patients undergoing spine surgery. The goal of this study is to learn if SpinePal is acceptable to people undergoing spine surgery. The main questions the investigators aim to answer are: * Is the SpinePal platform considered usable and acceptable by people undergoing spine surgery? * Is the SpinePal intervention feasible among people undergoing spine surgery? Participants will: * Take a screening questionnaire * Engage with SpinePal for about 2 weeks before surgery and 4 weeks after surgery * Wear a smartwatch * Complete questionnaires about 4 weeks after surgery * Complete a brief virtual interview to share feedback with the study team

Inclusion Criteria: * 18 years or older * English-speaking * Able and willing to provide informed consent * Scheduled for lumbar or cervical fusion surgery at least 2 weeks from the date of enrollment * Owns a smartphone with reliable internet and/or data access * Willing to engage with SpinePal and physiological monitoring via wrist-worn Garmin Exclusion Criteria: * Undergoing surgery for infection, malignancy, or trauma * Undergoing isolated thoracic fusion * Undergoing another major surgery within 3 months * Active suicidal ideation and/or severe mental illness (e.g., psychosis)