Nifty little GUI-less app to clear all received notifications with a single click from your homescreen. The app was taken down from GPStore due to the newish rules that forbid apps with no GUI hence I'm sharing it here since it can be still very useful to some.
Also, I am not the developer of the app.
As far as I can see it uses an accessibility service to launch the clear notifications command. It doesn't use Internet or share any data.