How do you fry without oil? Cooklite Aero Fryer is the healthier (and better) counterpart of a deep fryer. The single, most important difference that sets it apart from a deep fryer is that it doesn’t utilize oil or grease to cook food, instead, it employs hot air and consistent heat to achieve that delicious fried taste, but with up to 70 percent less the calories – effectively reducing the risk for high blood pressure and heart diseases; reduce cholesterol levels; and even help you to lose weight!