Auto Dark Mode is an application that aims to protect users' eye health by switching between light and dark theme automatically according to the time of day in Windows 10 and 11 operating systems. This feature, which has been around for a long time on platforms such as Android, iOS and macOS, is also available for Windows users. This software can automatically change the theme of desktop wallpapers, mouse cursors, highlighting colors and even Office apps, as well as themes. Users can also run their own custom scripts, delay the transition times of themes, and hide the app's icon from the taskbar. There is also a special mode so that the themes do not change while playing games, so game performance is not affected. The application is compatible with Windows 10 and 11 and has been updated with .NET 8. It can also work locally on ARM-based devices, which provides advantages such as lower background energy consumption and faster opening. Auto Dark Mode is a lightweight, portable and free application that aims to improve users' eye health and working efficiency.