You can find free BIM models stored in IFC format at :
http://openifcmodel.cs.auckland.ac.nz
(Note: The first 50 models have several failing validation. Most of the models between 51 and 100 pass validation. I personally found EFH ganz.ifc quite interesting. It has several levels and is an ideal example to show the apps ability to walk the virtual stairs.
Free 3d models stored in the other supported file formats can be found at:
The app enables you to correct the model orientation on import.
Apple and androids have a build in option to display models in 3D and AR.
BIM2XR adds user interaction with the models.
If you’ve installed the app on your device you can do a “long press” on this universal link. to choose between playing the app tour via YouTube or the App.
Universal link to duplex model in the above mentioned open ifc model library.