Honestly, I don’t know enough about the details of Hilchos Shabbos to argue with them. I just know that my Rav told me it’s a bunch of garbage. I seem to recall reading an RCA statement on it, although I can’t find it now. It rejected the app.
I only hope that it never gets released. I think that anyone who actually uses it most likely wasn’t really keeping Shabbos beforehand either.