using unity 3d models in android application

view full story

http://stackoverflow.com – i am working on an android AR application. In this app the user can place 3d model of a furniture and interact with these. i want to design these model in unity 3d. I am using vuforia sdk for app development. i also downloaded the vuforia unity extension for this purpose. But i don't know anything about using unity. Now the problem is that i'm not sure that i can use the unity model in my application? If not then which software should i use for designing these 3d models? (HowTos)