Prepare the apple: Wash the apple, remove the core, and cut it into even wedges. Leave the skin on.
Add the cooking spray: Place the apple wedges in a mixing bowl and lightly coat them with butter-flavored cooking spray.
Coat the apples: Add the graham cracker crumbs, cinnamon, and sugar. Toss gently until the wedges are evenly coated.
Arrange in the air fryer: Place the coated apple slices in a single layer in the air fryer basket. Avoid overcrowding.
Air fry: As a starting point, try 375°F (190°C) for 8–10 minutes, checking during cooking, until the apples are tender and the crumb coating is lightly golden. Adjust the time according to your air fryer and the thickness of the slices.
Serve: Carefully transfer the apple fries to a plate and enjoy warm. Serve with your favorite creamy dip if desired.