Open the app, tap 'Import' to select your model, then it will display automatically. Use touch gestures to rotate and zoom.

It supports common formats like OBJ, FBX, STL, and glTF. Check the app's supported list in the help section for detailed info.

Go to 'Settings' > 'Lighting' to control lights; select shading modes via the 'Visual' menu to visualize different shading effects.

Yes, tap on 'Inspect' mode in the toolbar to view model data such as vertices, textures, and material information.

Navigate to 'View' > 'Shading' and choose from options like wireframe, flat, or smooth shading for better visualization.

Yes, it offers a free version with core viewing and lighting controls. Premium features like advanced shading may require a subscription.

Go to 'Settings' > 'Account' > 'Subscription' to view options, then follow the prompts to subscribe or upgrade.

Try restarting your device, update the app to the latest version, or reinstall the app if issues persist.