This is another Google app available for beta testing. This app aggregates the content produced by Google for Android app developers. It has 3 sections for guides, blog posts and videos and at the each section, you can find information about development testing and app distribution. It definitely contains a nice content which you as developer usually read in Google developers blog. The app uses material design, all videos are going to be played in the YouTube view and all blog posts are opened in the web view.