"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.
> the term "meme" has evolved from an "animal/person with bold text on it" to mean any joke or popular concept
It's actually the other way around, "meme" existed in the general sense for many years before internet-image-macro-memes became a thing. https://en.wikipedia.org/wiki/Meme#Dawkins