The app allows for selecting which characters are actually in use, unlike several other apps that force scrolling through all characters. To me this is the biggest requirement for a Betrayal app. It even lets you pick the order for turns, which is the second necessary feature.
Unfortunately, it's quite buggy on that second feature. Picking the characters in order works sometimes. At other times, the numbers assigned seemed to be random, and after clicking Done the order wasn't what I selected. Sometimes after clicking Done the characters weren't even the ones I selected.
Why don't other apps have these character selection features? This app has them and would be the best because of it, especially if these bugs get squashed.