Preheat oven to 200°F.
Mix cinnamon and sugar in a flat dish.
Cut apples horizontally and toss slices in the sugar mixture.
Place a cooling rack onto a baking sheet.
Lay apples slices onto the baking sheet in a single layer. Cook at 200 for 2-3 hours, flipping apples halfway through.
Bake until dried out but still pliable.