Check below for installation instructions. Holofil 3D model viewer is now upgrade with Augmented Reality (AR) integration (beta launched) and 3D model marketplace to let you choose a range of FREE 3D models. 
 
For 3D model viewer best results put all your files (such as model, material, textures, etc.) in a single directory and compress it to create a single zip file for e.g. test.zip, and upload this single zip file in the app to interact with the model. 
 
HOLOFIL Android 3D model viewer has the following features.

1. Load 3D models in Glb, Gltf, FBX, Obj, STL. 
2. Rotate, move, zoom models
3. Control light brightness
4. Control light orientation
5. Control the background color
6. Load animated GLB / FBX models and play animations
7. Use Augmented Reality (AR) environment to create fun experiences and export recordings.
8. Export various type of animation videos. 
9. Supports 3D model files upto 65MB size. Reduce number of polygons for bigger sized models.
10. Might not work on some mobile phones (Please contact us if it does not)

Install HOLOFIL from the Google Playstore.
https://play.google.com/store/apps/details?id=com.Artosci.HOLOFIL
 
Free version has ads. If you do not want Ads then use the Premium version to remove ads.
Install the premium version HOLOFIL-X from the Google Playstore.
https://play.google.com/store/apps/details?id=com.Artosci.HOLOFIL_X
 
Have you looked at our patented holographic display device product HOLOFIL-cardboard for consumers? Its super affordable at less than € 100
If not do check it out www.holofil.com/holofil-cardboard You can visualize your 3D models, play 3D games using your mobile, and do many other things with HOLOFIL-cardboard. 
 
Have you checked out our latest 2D to 3D photo frame app that allows to convert your 2d photo in a 3D canvas mounted photo with a frame? 
www.holofil.com/game-store 
Upload a 2D photo and export a 3D model of a canvas mounted 3D photo frame. Animate it in HOLOFIL-X to use in Holofil device further. 
 
Have you checked out our latest 3D snake game that is launched under HOLOFIL Game store?
www.holofil.com/game-store 
HOLOFIL plans to release 15 new games / apps that can be played on our regular mobile phone as well as in the HOLOFIL consumer device. Check our first game HOLOFIL-snake-3D here
 
We have release many more casual 3D games such as Tetris, Bounce ball, Pachuman, etc. since the snake game. Check them here www.holofil.com/game-store 
 
You can build your own games and further play in HOLOFIL-cardboard. Check HOLOFIL-cardboard here www.holofil.com/holofil-cardboard