Patient Centered Post-Op Pain Management Software Tool Interventional Study Verses Standard of Care

The goal of this clinical trial is to learn if the Pain Coach App will result in less opioids being prescribed to and used by patients undergoing Shoulder/Hip/Knee Arthroplasty surgery while maintaining the same or better pain control versus standard of care. The main questions it aims to answer are: 1. Will elective shoulder, hip and knee arthroplasty patients using PainCoach App be prescribed and/or use less opioids, measured by total morphine milliequivalents (MME) after surgery when compared to those treated as standard of care while maintaining similar pain control? 2. Will arthroplasty surgeons using PainCoach App write more patient-specific prescriptions resulting in a reduction in opioids prescribed after surgery with no increase in further opioids prescribed in the months following surgery? 3. Will the use of Pain Coach App lead to equal or reduced healthcare system utilization after surgery? 4. Will patients and surgeons using PainCoach App find it helpful enough to use it again and recommend to colleagues, family and friends? Researchers will compare participants assigned to use Pain Coach App vs participants assigned to standard of care arm to see if there are differences in opioid prescriptions and self reported use. Participants will either use the Pain Coach App or follow standard of care instructions and be followed forward for the opioid prescriptions dispensed in community and self-reported opioids use at study end.

Inclusion Criteria: * Elective total shoulder (day surgery only), hip or knee arthroplasty completed within NSH, starting at the HI or DGH * OR date for surgery is known and booked * Able to access the internet via mobile device (has access to smart phone) * If expresses concern about low tech IQ, has a support person available * Able to read and write in English Exclusion Criteria: * Non-elective arthroplasty surgery procedures (trauma, fractures) * Bilateral knee or hip arthroplasty * Unable to read or write in English * Lacks capacity to provide consent due to cognitive impairment * No access to internet or mobile device to use self-help pain management tools * Inpatient Shoulder arthroplasty as residents write these discharge prescriptions