Sorry, allow me to elaborate. I have a 34 inch UWQHD curved monitor, and to make the best use of the space available I want to split apps between that real estate. E.g. i might want VS Code to take half or 1/3 of the screen, or split evenly between two apps, or split into 4 zones. Windows and Gnome/KDE come with some basic shortcuts that allow you to do this, to an extent (e.g. Win/Super+Left/Right arrow will split the screen in half and send the app you're currently on to the left/right of it). On macOS there's nothing out of the box, so you have to download third party tools, the vast majority of which are paid (tankfully Rectangle isn't)