The differences to the GeoGebra Web version
The Geogebra Phone App is a little bit different compared to the GeoGebra Web version and the GeoGebra Tablet App.
The touchscreen advantages:
tool button. After clicking, the tool bar opens and you can begin to creat new objects. With the 
arrow on the left upper corner you are able to go back to the main bar.
- By touching an object and moving the finger, you are able to change the object's position.
- By moving two fingers closer together you can zoom in the view and by moving them apart you can zoom out of the view.
- Moving the Graphics View can be used by touching and moving the finger over the view.
- When doing a long tap on an object in the Graphics View, the object properties window opens.
- When doing a long tap on an object in the Algebra View, the definition is shown in the input field and you can redefine the selected object.
tool button. After clicking, the tool bar opens and you can begin to creat new objects. With the arrow on the left upper corner you are able to go back to the main bar.