With the development of transportation and the diversification of society, more and more family members live in different places and thus, older people have an increasing tendency of living on their own. Young people and their family members may not be able to stay close around their elderly relatives, but modern technological developments can help us to ameliorate this problem. My project is particularly useful under the influence of the coronavirus, the elderly are the most susceptible people, so the elderly should avoid physical contact with people as much as possible. Mobile devices are an excellent way for seniors to communicate with family and friends as well as other individuals who live far away. My thesis, an app called WeFam is a family communication app that allows younger family members to pay attention to the physical and mental health of the elderly people in their lives. With the promise to “link families all over the world,” this mobile technology allows young people to spend more time with the elderly—by chatting, sharing information and media, playing games, and giving reminders—without disrupting the flow of their daily lives. Older users will enjoy a simplified, easy-to-use interface designed especially with them in mind. In order to meet two completely different target audiences, and to be convenient for users of different ages within a family. The biggest design highlight of this app is that there are two versions of some pages, which are designed for the elderly and young respectively from both visual and functional aspects.