The Card Battle is based on a free-to-play model, where playing is free, but some items like random card gacha can be purchased with real money. The game has over 400 different cards. By collecting cards, players are able to challenge characters from the original game, take on quests, and join in groups for more difficult boss fights. There are daily log-in rewards and in-game events with various Persona 4 characters such as Giant Killing vs. Kanji and Inaba Ski Tour as well as a reoccurring event called the Junes Cup. They've also done collaborations to promote things like Persona 3 The Movie with special cards obtainable in-game.