Call of Duty: Ghosts is finally available for PS3, Xbox 360, PS4, Xbox One (in North America), Wii U and PC. Activision has also launched a companion app for the same on iOS, which you can download for free here. Besides serving as a hub for Call of Duty-related news and information, it adds second screen functionality and Clan Wars along with clan editing.
Clan Wars is a standalone game wherein you fight in maps from main campaign. Success earns you in-game bonuses and rewards including customization options and bonus XP for multiplayer. The second screen option lets you sync your device to multiplayer matches and edit load-outs and squad before the match starts. It will also provide results of each match afterwards.
You can also use the app to join, create, and edit a clan along with designing your own emblem using the Clan Emblem Editor. The Clan Chat lets you speak to other members of your team. a clan entirely from inside the app. The extensive Clan Emblem Editor lets you design or edit your clan’s icon. Clan Chat lets you communicate with the other members of your clan.