There are no unsightly tracks on our invisible screen door. Ours is a simpler, less expensive design that is easy to install. When it is fully retracted, nobody will even notice you have a pull-down screen door.

To prevent bugs from entering, the screen fits closely to each side of the door frame and in front of the door jamb (see image below). The tension of the spring roller against the hold-down hooks keeps the roll-up screen door taut across the door opening. The tension is easily increased or decreased using a flat-head screwdriver on the side of the main housing. There is a picture here.