From my quick review, Ionic is a framework for building mobile applications using web standard technologies (HTML5/JS/CSS). You then build your application usi

From my quick review, Ionic is a framework for building mobile applications using web standard technologies (HTML5/JS/CSS). You then build your application using PhoneGap -- which builds a native mobile application wrapped in a WebView. This would be similar to writing a web app using jQuery Mobile and building a mobile app using PhoneGap. Ionic gives you a nice starting point, just like when you use Bootstrap for a website instead of writing all of your styles from scratch. Titanium apps are written in JavaScript (using Titanium libraries) that hook into native functionality. Your apps are then compiled into fully native mobile applications (not WebViews). It really comes down to the differences between running fully native apps vs. web views wrapped in a native application. There is a good explanation of the differences between here: http://stackoverflow.com/questions/17249500/xamarin-2-0-vs-appcelerator-titanium-vs-phonegap http://stackoverflow.com/questions/17249500/xamarin-2-0-vs-a....