|Visibility||Client-side and Server-side|
|Date added to the store||December 2013|
|Date removed from the store||December 2013|
Ultimate Add-In was a multifunctional CuP add-in. The Add-In can be compared to Go Penguin and the Penguin Editor as Go Penguin is also one of karl's current add-ins. It is known it could add items. When exactly this add-in was last seen is unknown. It was removed because KarlCSharp (karl), its developer, stopped developing it and removed the add-in.