iOS 13 is pretty great on the iPhone, but the real deal is iPadOS 13. With the new operating system, Apple split its tablet and phone platforms for the first time since the launch of the original iPad, and the tablet went in a whole new direction. iPadOS is still iOS, but now there are contextual menus, multiple windows for apps, a home screen that isn’t just a blown-up iPhone home screen, and a proper web browser. You can even plug in mice and USB hard drives.
Apple managed a fine balancing act here. If you update to iPadOS 13 and don’t really think about it, then everything (mostly) works the same, with just extra speed and polish. But if you want to dig in, you will find a whole new computer just below the surface.