“Paper Apps” seems like an overly snobby and infantilizing term for something we already had a term for: Puzzle Books / Notebooks.
"Apps" is just our current Zeitgeist term for products. Facebook, Reddit, newspaper... are now "apps". You don't have to like it (I don't either), but just like the term "meme" has evolved from an "animal/person with bold text on it" to mean any joke or popular concept, "app" has transcended the phone realm.