Non google-playstore based community android-app rating website
I found https://www.slant.co/tags/android:


users can ask subjective questions. 


i.e. What is the best android app for xxx

users can give subjective answers.


i.e. The yyy app is a good candidate 

users can add subjective pro and contra arguments.


i.e. contra: the yyy app consumes to much energy



The community can add more answers and pro/contra arguments and rate each seperatly.