The point is that "app" means application. "What does an application cost?" - well, is it a CLI that prints the current time in the terminal? Or is it Microsoft

The point is that "app" means application. "What does an application cost?" - well, is it a CLI that prints the current time in the terminal? Or is it Microsoft Word? You can get a fully functional well polished fart button app for both iOS and Android made for less than $4k, but I doubt you could make something like the Facebook app on even one platform for $400k.