Preheat oven to 350. Arrange apple slices in ungreased 13x9x2 pan. Pour apple cider over apples, sprinkle more cinnamon over apples. Combine Cake mix, brown sugar, melter butter and cinnamon. Stir until blended. Sprinle crumb mixture over apple slices. Bake at 350 for 50-55 minutes or until slightly browned and bubbly. Serve with ice cream or whipped topping.