An app designed to give people living alone peace of mind has become a sensation in China . China had more than 106 million single-person households in 2024, nearly 20 percent of all households and a 60 percent increase from five years earlier, according to the National Bureau of Statistics. The rise comes amid plunging marriage and birth rates, record numbers of retirees, and internal migration. The demographic changes are reshaping family structures and forcing millions to adapt to new