Is there any tool/editor to use with Unity iOS pro for creating terrains?

Hi all. As the the page from Unity website: I see that iOS and android version don't support Terrains in Graphic section. So is there any other tool/editor to use/work with Unity editor for the Terrains or we must create the Terrains by ourselves with the 3D software?

Unity Terrains does not work on iOS or Android. So the only solution currently is to model your terrains in a 3D modeling application.

I think the Unity guys are trying to get it to work, perhaps in a coming update.