Please note: the interface is currently available in Chinese only. An English translation is planned for a future release. Guandan (掼蛋) is a Chinese climbing card game for four players in two partnerships, played with two decks. Teams start at level 2 and work their way up to Ace, and the red hearts of the current level are wild — they can stand in for any card. Everything runs on your local Wi-Fi. There is no server, no account, no sign-up and no internet connection: devices find each other over mDNS and talk directly to one another over TCP. Nothing about your game leaves the room. Features * Four players in two teams, partners sitting opposite each other * A full match, not a single deal — both teams climb from level 2 to Ace, and a team wins only by taking first and second place together at Ace * The current level's red hearts are wild and can stand in for any card * Cross-platform: Android, iPhone and iPad players can share one table, and either platform can host * Bots fill any empty seat, so you can start a game on a single device * Drop out and a bot covers your seat, then hands it back the moment you rejoin — the host also keeps the table alive in the background, and clients reconnect on their own * A hint button when you are not sure what to play * Five colour themes, including a light mode, remembered between sessions All devices need to be on the same Wi-Fi network. Tribute (进贡) is not implemented.