[nilliams]

I think you're right to make this distinction. Titanium doesn't belong in the 'wrappers' family and would be better grouped with other 'cross-platform native' solutions like Xamarin [1], perhaps a 4th category in parent's list.

[1] http://xamarin.com/

[programmarchy]

Titanium is still not quite the same as Xamarin. Xamarin cross-compiles to fully native code from my understanding. Titanium, on the other hand, has JavaScript-to-native bindings i.e. a TiView is a JavaScript object which proxies UIView on iOS.

All business logic is still running in JavaScript. In fact, Titanium spins up a V8 engine just to run your app. This may be fine for the most simple apps, but if you need to kick off a long running operation to a background thread, for example, you're in for some gymnastics.

I'd rather have Grand Central Dispatch, CoreGraphics, CoreAnimation, etc. all at my disposal. Using Titanium felt very restrictive. Their API is a one-size-fits-all between iOS/Android/etc. As soon as you want to step out of that least common denomination, you've got to write native modules. Which, if the people on your team don't know native development, can be a problem.