glTFShowcase is a gltf/glb file viewer for Android devices.
It supports material views environment adjustments filters/tone mapping image sharing and sketchfab integration to explore free models.

Supported file types:
- glTF 2.0 (.gltf and embedded)
- glTF 2.0 binary (.glb)
- zip file containing above assets

Supported Environment file types:
- .hdr
- .exr (Single-part only)
- zip file containing above assets

AR is supported dependent on devices. (ARCore Required)

Visit developer's website for more information.