Playing Cash Rally with friends is more fun.

How to add friends: Players can click on the Add Friends button in the FRIENDS tab of the Inbox to search for a friend's ID or follow the game's recommendations to send a friend request. Once the other player agrees, you become friends.

How to send gifts: In the Friends List, select the corresponding friend and click the button to send coins, cards, stamps, or to change the friend's in-game nickname or add them as a star friend.

How to help each other among friends: By selecting the stamp or card you want in the Post Station, all your friends will see your request; similarly, you can also see their requests and send gifts to each other as needed.