You are absolutely right: It's been a while since I last used Titanium. At the time you had to use a crappy/buggy UI to compile your app, with random bugs ocuring all the time, not being able to build once you've upgraded to a newer version due to backwards incompatible changes and more weird incompatibility bugs with other versions of XCode, and so on. I hated the experience since I couldn't rely on being able to building my app and Objective C library support wasn't available at the time or didn't work very well. I quitted using Titanium once they switched from their own buggy UI to Eclipse for building, my code was backwards incompatible, the UI couldn't compile to older versions of Titanium, I had enough. It's true, it has better performance as say a Phonegap, but it did have some weird layout issues from time to time which were hard to fix. Overall I think it's a nice product for creating an app without learning Objective C but I won't use it for a clients app any more, too unreliable.

Oh, and yes, it is 'cross-platform', except for the fact that there are so many things not working on Android (either bugs or non supported in the API for Android) that you need a seperate build for android to make it reasonably useful.

This is al based on my experience with Titanium Mobile from around 2 years ago, so it might be better now.