Google is pretty poor providing Android frameworks at the same level as any *Kit available on iOS.

They leave it to the open source community and only due to lots of pressure, did they finally released something like "Android Architecture Components".

Tango as other mentioned is not actually there.

Stuff like CoreML, MetalKit, Model I/O, GameKit, SceneKit, SpriteKit, Image I/O,... just doesn't exist at the same level as Apple.

Well, some of them do exist, but as open source projects without any support from Google.

Lenovo and Asus are the only 2 with Tango without much fanfare.

Google licensed one of the AR patented from Flyby Media which Apple has acquired and its patent portfolio, we see why Apple could developed it faster.

the post wasn't about arkit, it was about coreml.