I have to convert a UWP app to be compatible on all OS. I am creating cross platform- Native portable xamarin project for this and not using xamarn.forms and whose core is a PCL. I have used MVVM light in my existing UWP app. I see that mvvm light is not compatible in xamarin.touch. What should I go ahead with? Can I use mvvm light for windows phone project and mvvm cross for others? or Should I use mvvm cross for all?
Why do you think MvvM light is not working with Xamarin.iOS? MvvMLight is available for
http://blog.galasoft.ch/posts/2014/10/announcing-mvvm-light-v5-for-windows-and-xamarin/
So you can use MvvM light or MvvMCross. I'd not recommend to use both frameworks in one project.