Xam.Binny (nuget): Display a store rating dialog after a certain number of uses, or a certain number of days after installation           or on demand (eg on button tap). The user can leave a rating, delay giving a rating or decline to give a rating.           The rating dialog brings up the relevant store page. If the rating request is declined then a feedback dialog is           shown which sends an email to the developer.
Keywords: xamarin|pcl|xam.pcl|store|rating|review|windows|phone|winphone|wp8|android|xamarin.forms|ios