Most common air fryers do have a dehydrator setting that works effectively to dehydrate all different kinds of fruit. Your air fryers should have space to place cut up fruit that is ready to air fry. If you do not have an air fryer and you are only interested in dehydrating apples and other fruits, you can buy a dehydrator alone. A dehydrator will have more space for extra fruit compared to an air fryer. An air fryer is a more versatile appliance and one hundred percent worth the investment.