I've succesfully tested Easy AR3.0.1 on iPad Mini2/4 iPad AIR and iPhone6s, and I have to say that the performance is pretty poor, on iPad Mini 2 and iPad AIR, it's lagy I could say 15 maybe 20 fps max, on iPad Mini 4 and iPhone 6s, much less lag but is not smooth at all.
Any advise on how to improve performance on iOS?, I get better performance on a old Android, Moto G3 with android 6 than on iPad Mini 2/AIR
Playing around with the Graphics APIs, I have tested Metal over OpenGLES2 and OpenGLES3 over OpenGL2, and even Auto, and the graphics performance had an evident improvement, but the image detection get worst, with openGLES2 the detection is much more stable, but the graphics performance it's pretty poor.
Another test I did was to scale graphics, adjusting the Fixed DPI to 150, an evident performance gain can be obtained with that, but still feeling lagy, and the image detection is not stable. And all the graphic markers get 5 stars on the testing tool.
I really thought that on iOS will run better than on Android, but it seems to be the contrary.