Betrayal at House on the Hill is a board game published by Avalon Hill and designed by Bruce Glassco. The game is split into two parts. In the first, the players become trapped in a haunted house which they must explore, revealing rooms as they do. At some point the second part, the “haunt”, begins in which one player (generally) becomes a traitor and everyone plays out one of 50 scenarios pitting the traitor against the others.
An important part of the game involves tracking each of the player’s attributes (each character has a different range of possible values for each attribute). Since the included cardboard trackers can be loose and tend to slip out of place, a few different smartphone apps have appeared to help the situation.
The earliest Android version is Betrayal Character Cards. This app does the bare minimum needed. You can see a list of characters, see their attribute ranges and select the current value for each. As a small extra it also includes the birthday and hobbies of each character (which has a minor gameplay purpose).
Out of the apps available this is the simplest and has the least features. On the other hand this should run on the widest range of devices.