Pet Society was a social-network game developed by Playfish that could be played on Facebook. The game ranked as one of the most popular Facebook applications. Players could design their pets by choosing genders, names, colors and altering appearances. The user interacted with their pets through washing, brushing, petting and feeding. An iOS version, Pet Society Vacation was released in 2011 with similar gameplay, but set on a tropical island with new settings like an underwater reef.