大富豪 - トランプゲーム is a card game app that brings the popular Japanese game of Daihugou to your iPhone. With this app, you can customize the game rules and the number of players to suit your preferences.

In the rule settings, you have the ability to adjust various game rules to create a unique playing experience. Whether you want to play with special rules or modify the scoring system, this app allows you to tailor the game to your liking.

The system settings offer even more customization options. You can choose the number of players, adjust the game difficulty level, and even change the background image to create a personalized gaming environment.

It's worth noting that this app introduces a twist to the traditional gameplay by handling the joker card differently. In certain cases, the joker card is not the strongest card in the deck. During "number restriction" situations, the joker is treated as one rank higher (or lower during revolutions). Additionally, if the "return 3 of spades" rule is enabled, you can return a 3 of spades for each joker card in play.

Overall, 大富豪 - トランプゲーム offers a fun and customizable card game experience on your iPhone. Whether you're a fan of the original game or looking to try something new, this app provides an enjoyable way to play Daihugou.