I'm working with Xamarin.Forms for a couple month now but only on Smartphones. Now I want to build a app which will be later used on Smartphones and Tablets (Android and Windows 10). What do I need to know in advance? For example what is about the UI scaling and the order of the UI elements? Are there any tutorials which shows whats important to know in this case?
There will be also a Backend for the app, is there anything which is against using REST with Xamarin?
Thanks for every help.