Ok, so something called ARInterface I recall being mentioned at Unite Austin, but, I need a cross platform markerless AR solution today!
Is anyone doing this presently?
How are you creating Ar apps that work on both iOS and Android?
Is it that difficult to combine both ARkit and ARcore?
https://developer.vuforia.com/forum/unity-extension-technical-discussion/markerless-ar-vuforia
Have not tried markerless with this myself, but have used Vuforia for marker tracking before and worked great for cross platform stuff. This is an issue though and hope a proper solution can be found.