I'm having problems to figure out why vuforia is giving me this error: "Vuforia App Key is not valid for this product." since I'm configuring my AR (using image targets ) app with a Developer - Device Licence key, just like I did in many other apps. It works on iOS and in some Android devices(ie: Samsung S4), but is some of them I get this error. Its seems that Vuforia thinks that those devices are Digital Eyewear device when, actually it is a Tablet.
Using Unity 5.3.2f1
Device with problem: Irulu x7 7"