Poweroff Timer is a windows universal application(UWP) in Microsoft Store written in C#. This application enables you to set a timer to shutdown your PC at a specific time. It makes your power management much easier and more convenient.
When you assign the timer, PowerOff Timer will minimize in the system tray and run silently in the background. if you right-click on its icon, the menu that appears will allow you to immediately cancel or change the shutdown time, with a single mouse click.
In detail, this application is consisted by two executables (one UWP and one WPF) which collaborate and provide the extra functionalities of background running application and tray icon which are not currently present in UWP.
Your can find the application here: https://www.microsoft.com/it-it/p/poweroff-timer/9nd0vqh5xckf?rtc=1