3D Model Viewer is a free Android app developed by Aaron Jacobs. It is a 3D model viewing app that allows users to view 3D models on their Android devices. The app comes preloaded with sample content, and it also allows users to import .obj model files and apply jpg/png textures.

In addition to these features, users can also rotate models in 3D space, zoom in and out with pinch gestures, and toggle textures, lighting, and wireframes. The app also allows users to modify lighting color, brightness, directionality, and position. If users encounter any issues while using the app, they can send an email to the developer for support.