Thank you for your helpful response selectodude! In that case perhaps I should apply there, can I list you as my reference?
That answers my question, thanks for supplying the case reference.
EDIT: Actually I don't understand how this case applies... The key passage seems to be:
"We conclude that cellophane's interchangeability with the other materials mentioned suffices to make it a part of this flexible packaging material market."
My point is that there is no interchangeability between ios apps and android apps. Customers tend to have either ios or android and aren't able to freely choose between the two. What am I missing?