Given the increasing volume of hip and knee replacement surgery with reduced hospital stays and resources, we explored technology to address gaps in patient care and enhance self-management. The team at the Holland Orthopaedic and Arthritic Centre of Sunnybrook Health Sciences Centre, which performs a high volume of joint replacement surgery, partnered with patients and a health technology company to create a mobile app: myHip&Knee. The results to date demonstrate that the app improves patient experience and reduces follow-up calls to surgeons' offices, ultimately reducing demand on healthcare resources. Early engagement of privacy and legal services, close patient and family collaboration and a well-developed evaluation strategy represent critical steps to successful development.