YYNote is a desktop productivity tool designed to solve the problems of chaotic task management and scattered work arrangements. It embeds the to-do list on the desktop, supports drag-and-drop sorting, one-click top and countdown functions, and can set recurring rules to automatically generate periodic tasks. The software supports multi-terminal synchronization and can synchronize data in real time on Windows, HarmonyOS, Android and iOS platforms to ensure that work arrangements are online at all times. Intelligent classification management is realized through the tag system, and calendars and third-party calendars are integrated to facilitate centralized management of schedules. YY