The app has only been available for a week; it has a 2.5-star rating on iOS and a 2.8-star rating on Android (both out of 5), with comments ranging from "you people disgust me" and "superstitious ignorance" to a few supporters who, it must be said, seem to find the app awfully buggy. But it's still up, unlike, say, an app in which you hurl cartoon shoes at a cartoon George W. Bush.