This app was mentioned in 4 comments, with an average of 1.25 upvotes
BeerBox combines AR and VR. I found it really awesome.
https://play.google.com/store/apps/details?id=com.schulzegipson.beerbox
If your cardboard has a camera cutout, I would say Beerbox. https://play.google.com/store/apps/details?id=com.schulzegipson.beerbox&hl=en