Did this from literal scratch.
Modeling, uv'ing, putting inside unity and texturing and scripting in C#.
There are scripts like:
-camera changer
-ar behaviour
-hide/show levels buttons
-ar button overlay with animation and event handler
-camera swiper (with touch on phone)
-switch off for AR cam behaviour when we are in "inside room" camera
-limiter of camera switch handler
-buttons for going back and much more :D
ar apk demo