restrain avaibility of unity android applictaion to only phone or tablets

Hello everyone,

I have a galme for wich i want to set a different price on xlarrgescreen (tablets) compare to small or medium screens (phone)
so i'm thinking to do two versions of the application, with a different price
how can i make each version only available for the targeted device?
it seems that if set support for xlargescreen to false in android manifest, the application will still be available for tablets and will use a screen compatibility mode

many thanks for the help

Ashkanis