The game works on Android phones and is available in the Google Play Store (click on the link or look for "Catholic Trivia"). The app is free and doesn't demand the right to use your camera or anthing else - except in-app purchases so you can give a donation. The game was made by Australian Dominicans and you can read more about them here.
Katolinen.net rating: Pleasantly addictive, three Popes out of three