I've been looking for something to implement local notifications for my Xamarin app. I needed something to show a notification for my app's calendar events.
In my research, I found this one and I am using it.
A Xamarin Framework for Backgrounding & Device Hardware Services (iOS, Android, UWP, Tizen, tvOS, watchOS, & more coming soon)
It worked out of the box.
I only had a problem with Android, but using the most recent version (Make sure you are using the link for MyGet Packages instead of Nuget Packages to get it).
There is also a repository for the samples :
And here is the link for the Documentation :