I try to port my AR demo app to HoloLens. It is Unity project and works on Android currently. Of course I use the same target. But my target which is recognized well running on Android smartphones or tablets is not recognized on HoloLens. Target manager gives just two starts for my target. But it still work well for Android and for HoloLens is not recognized at all. If I substitute my target with target from the Vuforia demo (chips in particular) then it works fine. So it seems to me that recognition rate in Vuforia for HoloLens is significantly less then for Android.