python kivy interface improvement -- 2

we need a good UI/UX designer who can help us to improve our app interface (it's a article reader written with python kivy lib)
most of the framework function and the outlook structure were done, we need your help for

1. improve our interface which should be super decent looking, like kindle for example.
2. setting all the text, photo, dialog and widget to be all mobile/screen size responsive
3. pakage it to .exe / apk / ipa file

the python kivy source code is attached please check