Why can't I download this app? - 1

I was looking for a trivia/ranking game and found Proust when I googled it. It like gives you different options and you rank from best to least and compare your opinion of the order to other people's.
But when I go to the App Store it says it's not there. Do you know if it was deleted? And if so, are there any other games like it that I can play? It looks really interesting and I'm disappointed that I can't find any other games similar to it.
I have an iPhone 5c btw, if that makes a difference.

Proust isn't a trivia game. Its a personality tester.

It's still available on Google Play, so it was either never available for iOS or was pulled.