Digital Product Design Coco AI Healthcare Assistive App by Zhiqi Lin and Hanhui Li Coco is a mobile health application designed for adults aged 50 and over. The application combines personal medical data with condition specific guidance and verified health information in one interface. Daily check-ins, medication reminders and vital sign tracking support routine care, while connected wearable devices record readings in real time. Health summaries can be shared with family members and doctors. Simple language and clear navigation aid older users. Coco was created to reduce information overload and to support independent health management.