Unity modules for iOS?

Hi everyone! I was wondering whether I'd be able to build an app natively in XCode that uses Unity modules to handle 3D viewers of an object. This is for an educational app that includes mostly video, text, etc, but I'd like to also include a few "3D viewers" where the user can rotate and zoom in on a 3D object. In other words, I'd like to build my app mostly in XCode and then use Unity to render a few interactive 3D views. Does Unity offer this type of functionality or would I have to build the entire app in Unity? Thanks!