The document discusses public self-service on mobile devices in Denmark. It notes that nine out of ten Danish adults have smartphones and every second senior citizen has one as well. It questions how the public sector can adapt to the rise in mobile use and stresses the importance of responsive design, usability testing on multiple devices, and following design best practices. Some lessons learned are that a "mobile first" approach, frameworks alone, and testing on only one device are not enough to ensure a quality user experience across all mobile platforms. Consistency, credibility, and enabling self-service are keys to good digital design.