Is potato starch the same as potato flour?

Potato starch is made like corn starch were by they pulverize the potatoes or corn, and let the mash with water settle, then filter the works, the starch is left and dried into a powder, potato flour is made like instant potato flakes were by they smash and steam the potatoes, dry the mass in sheets, on tumblers to make a long sheet, flakes are just broken up flour is ground fine, in some recipes starch can be used for flour, in breads and fillings, it will thicken like cornstarch the flour is best for hearty recipes, but in a pinch they can be used interchangeably