Slice and core apples (I left the peel on, you can remove if you like). I used the KitchenAid Spiralizer to slice and core the apples to 4mm thickness
Sprinkle the apples with cinnamon if desired
Place the slices directly on the oven racks.
In Air Fryer Countertop Oven with Dehydrate Function
Set oven to dehydrate - 150 degees, 6 hours.
Place apple slices on both the air fry basket (in top slot) and on oven rack (in bottom slot)
Dehydrate to desired consistency. (For chewy texture, you won't need the full 6 hours.)
In Regular or Countertop Convection Oven:
Set oven to Bake
Set temperature to "Warm" - this will be about 150 degrees F.
Allow them to dry to desired chewiness.
Mine took 3 hours. They shrunk quite a bit and felt leathery on the outside. The cinnamon ones tend to finish a little sooner, I think the cinnamon helps draw or absorb some of the moisture.
Turn the oven off and allow them to cool in the oven.
I store them in an airtight container for a few days or in the refrigerator for longer - but they probably won't last that long!
Nutrition (approx. data estimated via online nutritional calculator.)