Manipulate object on a tablet

I'm a Unity & C# beginner.

I would like to develop the tablet application by Unity, which can freely show some polygon model such as a person. You know it is possible to manipulate a GameObject freely like movement, rotation and zooming using Gizmo on the Scene View in Unity. I would like to do it on a tablet.

Can you give me some scripts or advices about it? Thank you for your consideration!