What is the GeoGebra 3D Grapher?
The GeoGebra 3D Grapher is a dynamic mathematics app connecting 3D geometry and algebra. 
Note: The app is available for Android phones in the Google Play Store. If you are using a different phone, you might want to open GeoGebra Web in your phone's web browser instead.

Touchscreen Features
- Drag an object with your finger in order to change its position in the 
 3D Graphics View. - Zoom in and out of the 
  3D Graphics View by moving two fingers towards or away from each other. - Rotate the entire 
 3D Graphics View by dragging its background with your finger. - Open the Object Properties by using a long tap on any object in either the 
 3D Graphics View or the 
 Algebra View.