Performance improved in Angular 2.0 as compared to Angular 1.x. Bootstrap is now platform specific in angular 2.o. So if application is bootstrap from browser it will call different bootstrap as compare to mobile app. So for browser bootstrap. There is no mobile support in Angular 1.x. AngularJS 2.0 is made keeping in mind mobile oriented architecture.There are libraries i.e. Native script which help mobile Angular 2 mobile development fast.