What technology is used in World of Warcraft armor?

Question

Mobile development

There is an Armor app that gives access to the character and his World of Warcraft bank/inventory. It has the following two main scenes: a menu (various buttons) and a 3d model that can display animation and the camera can rotate around it.
Here's an example: cdn2.gamefront.com/wp-content/uploads/2012/08/wow-...
Using Unity for this is too much of an overhead. Tell me, how is this possible implemented on obj C? Using libraries for displaying 3D models?
The second question, if possible:
Tell me, a worthwhile book on the architecture of mobile applications. Available in different languages: windows phone, iOS, Android. I will be very grateful.