Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x9-inch baking dish.

Blend flour, sugar, butter, and cinnamon together in a large bowl with a pastry blender until crumbly. Reserve 3/4 cup mixture for topping.

Sprinkle a light layer of flour mixture into the prepared baking dish; top with a layer of apples. Continue to alternate layers of flour mixture and apples, ending with apples. Sprinkle with reserved 3/4 cup flour mixture.

Bake in the preheated oven until apples are tender and topping is lightly browned, 30 to 35 minutes. Let cool for 10 minutes before serving.