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? I accidentally deleted Mario Kart Tour. If I reinstall it, will I lose rubies and other items? [Android]Support Code: 806-5433 is displayed. Can I receive rubies for free? [Android]If I change devices, will I lose my rubies or other items?