Most modern washing machines and dryers have a crease protection mode. It works in a purely mechanical way: After the washing or drying cycle is finished, the drum keeps up a periodical movement. The clothes don’t rest in the same position but are moved from time to time which prevents the development of creases. This is helpful when you can’t be around to take the laundry out immediately. The amount of shirts to iron is still the same, but it is easier to do.