How to only support 2 gb apple devices ( iPhone 6s and above )

Hi, I only want to support iphone 6s / iPad 2017 / and above devices with 2g rams

How can I achive this? if I set min os 11 or only metal api ( still includes iphone 5s and iphone 6 )

Fornite done this
https://itunes.apple.com/us/app/fortnite/id1261357853?mt=8

 

I'm not sure exactly, but I know some companies achieve things like this by requiring devices with front and back cameras or other newer hardware features.

Apple have never let you exclude devices based on performance, unfortunately.

 

A lot of people just say at the top of the description the supported devices. Apple does not allow you to exclude devices explicitly.