I could not find a solution for banner implementation. The api from admob does not work for windows phone or uwp. Also i can not add a banner via admob or anything with the pcl project. The banner will be shown always at the bottom of the app. I would like to develop the ui in xaml in the pcl project. I found a discussion with a custom renderer. But it was not a banner advertising. Is it possible to add a advertising in a xamarin.forms app for all plattforms or at least for android and apple?