3D model formats in ARKit / ARCore development

Question

I am a beginner at AR game development for both iOS and Android. I have the following questions:

1. What kinds of 3D model formats are supported by ARKit for i

Answer 1

I not sure did you checked ARCore properly. The basic example delivered by Google is working on .obj format. ARCore is set of tools related with AR only. You can use 3D format whatever you want as long as you will be able to use it on Android. It is not related with ARCore Question 2 is not related with ARCore and/or android or even arkit