Here is a very interesting web app with mobile camera reviews https://www.facey.top. It’s possible to see photos from different mobile devices, search for devices, find device with the best cameras etc.

I would like to recommend Facey Camera as the best app for making selfies.This app has unique feature of taking pictures when face(s) are detected. So, You don’t have to worry that someone will be left out of focus even if You capture with back camera.