@thenilko so basically asking for somebody to write an application for you?
I think you would attract more helpful responses if you first show you’ve put some effort into getting to where you want to get.
Doing the NativeScript tutorials is a good way to get familiar with the framework, and what you can do with it.
If I am not wrong it also shows how to make http requests, which is what you will want to do to fetch rss feeds.
Parsing them is another matter, but there are plenty of tutorials online how to parse xml. Then you will want to display the extrapolated data, and this is where data-binding comes into play - you will learn that by doing the tutorial on the official Docs portal.
http://docs.nativescript.org/angular/tutorial/ng-chapter-0.html is the angular alternative if you are already familiar with Angular + TypeScript