After Google Reader retired I found "Spase rss" which I modfied for my needs.

Modifikations:
* Improved Swipe with loading in the background via PageAdapter.
* Pimp up with a Picture in an Collapsing Toolbar
* AMP Support with fall back to Feed View
* New Readability
* Google Weblight Support
* Button Bar for your thumb
* Black and White Theme
* Fixed some bugs and issues with newer Android Versions

Thanks to S. Handschuh for the source code.