Example to use Xamarin.Android/iOS chart in Xamarin.Forms

Hi,

I am new to Xamarin and looking for possibilities how to use Xamarin.Android (later Xamarin.iOS too) chart in Xamarin.Forms shared code.
I know SciChart working on it, but at this moment I need solution.

I have alredy read about these:
– Custom Renderers (https://docs.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/custom-renderer)
– Native Views (https://docs.microsoft.com/en-us/xamarin/xamarin-forms/platform/native-views)

Which is better?
Does anybody has an exact example or documentation to how to use it with SciChart?

Bests,
Roland