1) in Android (Java) :
There are different folders for Phone and Tablet
Layout
Layout-large
layout-xlarge
2) in iOS : use Universal setting.
I have not tried In Xamarin forms. I need some help.
What are the things I need to do if the app is for Phone and tablet ? and there are so many screenSizes.
How to design the Page for multiple screen sizes?
If I start from Tablet size, the page display in phone may be not fit?