Hello there,
Nice to know your interest on developing AR/VR application.
Well I see that the point of your app from what you explain on the project description is a 3D Object projection apps. And in my experience as Unity Developer, my suggestion that using VR technology is much better rather than the AR. Since on the VR, the user can freely move on interaction. Different with AR, user need to pointing the mobile camera to the targeted object so the object will be spawned. 3D Object projection on VR have so many potential interaction that I can design for you, since on the mobile there are many sensor that we can use as interaction controller such as accelerometer, gazed input, dept sensor, etc. You can check one of my portfolio of mobile Virtual Reality horror and thrilling games on my Freelancer Profile. It used accelerometer sensor to move forward and backward, and it has a gazed input when gazing on interactable object.
Can you tell me more details about this project? That is my suggestion to reach the desired result for your purpose of the apps... Love to know more if you'd like to chat about it.
Best Regards,
Haidar Abhirama