A safety app named 'Are You Dead?' has gone viral in China, becoming the top-downloaded paid app. Developed by young entrepreneurs, it prompts users to check in every two days; failure to do so alerts a pre-selected emergency contact. The app addresses growing concerns about loneliness and safety among China's increasing number of solo dwellers, with projections of up to 200 million one-person households by 2030. It is praised for its simplicity and directness in providing a sense of security.