I think they have not updated the information. The kiosks to pay with card have been removed (at least at the lot I was at). Believe me, I would've used it if available.
That’s disturbing, even given that it’s a private lot. I have a smartphone, but I strongly resist installing apps, and would really not want to install this. And what if the app doesn’t work with your particular phone/Android version? I would support a law that required all merchants to accept cash for purchases under, say $1,000—I also despise those stores that only accept payment cards and refuse cash.
You don’t need the app.