I think the movie will prove what is canon or not. At most the app is canon to other universes, as it has too much contradictions to be canon to the movieverse. Unless a retcon/reboot happens that edits past movieverse history. Like others have said; According to the app, ROTF and DOTM did not happen, but we already see the Ark in TLK footage. So the app is like the movie-comics, another universe.