I. In voltaic cells the flow of electrons is spontaneous.
II. In electrolytic cells electrons flow in the external circuit (through the wire) from the anode to the cathode.
III. In voltaic cells the cathode is the positive electrode.

(may be broke/outdated!)
I. In voltaic cells the flow of electrons is spontaneous.
II. In electrolytic cells electrons flow in the external circuit (through the wire) from the anode to the cathode.
III. In voltaic cells the cathode is the positive electrode.