Can I use rubies in other games or applications? No, you cannot use them in other games, applications, or services.Rubies can only be used in Mario Kart Tour. Related articles Do rubies expire? [iOS]Support Code: 805-5412 is displayed. [iOS]Can I combine my ruby balance with those purchased in Mario Kart Tour on non-iOS devices? [Android]Can I combine my ruby balance with those purchased in Mario Kart Tour on non-Android devices? I want to check the e-mail address registered with my Nintendo Account.