Hip and knee osteoarthritis (OA) are increasingly prevalent among older adults and often impair daily functioning. Current OA treatment guidelines emphasize the importance of self-management, particularly through improving physical activity, weight management, and sleep. Although these behaviors are essential for effective OA management, many individuals experience barriers to adopting and maintaining them. To help patients overcome these challenges, support needs to be tailored to their individual needs. Digital interventions offer the potential to deliver personalized support if informed by users’ experiences and needs. Therefore, this study examines the experiences and perceived needs of individuals with OA regarding behavior change in physical activity, weight management, and sleep supported by a digital intervention.