[kizza]

My experience: Phonegap: Responsiveness is bearable on iOS but on Android it is very slow - scrolling is choppy and there is a noticeable delay between pressing a button and seeing it activate. We abandoned it at this point.

Titanium: The layout code seems to be different between iOS and Android so if you get your app to look right in one platform it can be completely wrong in the other. On Android it bundles the V8 Javascript library so it's definitely not native code but at least with V8 the speed is not a problem. Titanium adds about 10MB for its stuff which is annoying to me as an old programmer!