This study details a method for mHealth app development and user experience design (UX) evaluation, which generates a comprehensive list of stakeholder-users, acknowledges UX barriers, advocates multiple methods, and argues that developers should address the UX needs of each stakeholder-user in a complex health-care system. A case study of a research project on an mHealth app for women who are considering prevention of or treatment for osteoporosis assists to elaborate and define the method. To find any measure of success, a fully functional app for older users should be integrated into the entire health-care system.