Wash and core the apples, you can either leave the peel or take it out. Cut the fruits into rough dices that are neither too small nor too big.
Place the diced apples into a large saucepan, then sprinkle with cinnamon. Add lemon juice, water and gently mix to combine. Cover the pan with a lid, then simmer over medium heat for about 20 - 30 minutes, or until the apples are tender and the mixture has thickened. Stir frequently while the apples are cooking, or they may burn.
Remove the saucepan from the stove. For chunky cinnamon applesauce, transfer the apples to a large bowl and mash them with a potato masher or a fork. For a smoother texture, transfer to a blender and process until creamy.
Let cool completely to room temperature. Serve immediately or store it for later.