Hi,
My question is quiet simple, I want to know if houdini asset can be used for UE4 mobile dev? or it is just for PC and consoles?

Houdini Assets (HDAs) need to be baked to Standard Unreal Assets (Static Meshes etc.) to be used in an Unreal game. Of course, Unreal Standard assets work on any platform that Unreal supports. So the short answer is: Yes.

Note: Currently Houdini in Unreal is not running at realtime, but only at editor time.