An app is sort of like a physical object, like a flyer. It reminds you of them. The place on iOS or Android's home screen has this effect. It's kind of similar

An app is sort of like a physical object, like a flyer. It reminds you of them. The place on iOS or Android's home screen has this effect. It's kind of similar to how Windows apps added themselves to the Start Menu, the desktop, and the taskbar.