Credit card roulette is a game where everyones credit cards is piled together and one is randomly chosen to pay the entire bill. Usually a waiter, waitress, or other unbiased person has to be found and asked to select the unlucky card.. but now you can use this app instead!
Just input everyones name and the app will slowly remove names from the list one by one until the "winner" is found.
If the bill is too large for one person to reasonably pay, you can set the app to select multiple people.