Ionic 2 / Xamarin / React Native / PhobeGap (Cordova) and why?

Xamarin, cause visual studio, .net and c#

With the existence of ReactNative, Nativescript, and Weex, I don't think there's any reason to use hybrid solution like PhoneGap anymore. I don't know about Xamarin and ionic.

Ordered conclusions:
Old hybrid frameworks:
Phonegap (Cordova) - based on javascript
Ionic 2 - based on Cordova but fits to AngularJS2

New native app frameworks:
Xamarin: Microsoft solution, C# .NET, actually hybrid but many native APIs connect to it (if I understood correctly)
ReactNative: Facebook solution, based on ReactJS, a bit steep learning curve
Nativescript: Works with Angular2 and is a native api
Weez: Alibaba solution, also native but too Chinese for me

Guess I'd go with NativeScript cause I liked Angular2, @kudamalam thanks for the advice!

why.js, hmm the name sounds cool. Ionic is my favorite but I am planning to work on React Native in coming month.

What about Titanium ?

@Kodoyosa I saw they require $999 annually just to watch some sdk tutorial videos, they sound like a fat whale thirsty for money

Weex has a lot of typos on their site. Anyone knows why?

@YousifMansour bad English education in China probably?