Hi,
I have been working on Titanium Appcelerator ever since its first release and am quite conversant with the API. I also have Android Devices to test the application on a real device before delivering the same.
My approach is to compile, comvert and test the application on a real device so that all areas are covered. I guess most of the time it would be to remove iOS specific code to generic code.
A lot also depends on the iPhone UI as Titanium has certain restrictions on the number of TabStrip Elements a Android View can have. A UI redesign in that case would be called for.
Best Regards
Vishnoo Rath