Roon Support for legacy Apple devices

Does anyone know what the limits are for running Roon on older Apple devices and operating systems? I’d like to see if I could turn some of my old unused phones, ipads or laptops into Roon endpoints. I’m sure some others would be interested in this info as well since it seems like a good way to recycle some of this older hardware. Any tips on optimizing the device for sound quality if streaming is to be it’s dedicated function?

Needs to be ios11 or higher.
So unfortunately a lot of these old iPads that we all have lying around that were rendered useless overnight by Apple are still just that… useless :frowning:

I control mine with an iPad Air 2 which works fine.