Just FYI, fragrances are VOCs, pretty much by definition. They have to be "volatile" or else you wouldn't smell them, and every chemical except noble gases is a "compound." I suppose some plug-in air freshener fragrances could be inorganic, but I think the majority of inorganic volatile compounds probably smell bad (think ammonia or sulfur compounds).

A "VOC free" air freshener would either be pointless or BSing you.