The Curse client is an add-on manager for "World of Warcraft" and four other games, not an add-on for the game itself. The features of the client provide add-on syncing over multiple computers, backup of settings, add-on sharing with other players and game security improvements. In addition to "World of Warcraft," Curse supports add-on management of "Runes of Magic," "Rifts," "World of Tanks" and "Skyrim."
Curse maintains premium and non-premium versions of the client. The premium version offers additional features, such as one-click updating, automatic updating and an ad-free interface. As of August 2015, the Curse client runs only on a Windows operating system. A client for the Mac operating system is under development.