Remove the cores from your apples (Gala, McIntosh and Honeycrisp are good, naturally sweet options), then slice them in quarters (do not peel). Add all ingredients to your slow cooker. Stir so the apple chunks are coated in the cinnamon, nutmeg and apple cider vinegar.
Cook on low 3 to 3½ hours. About two hours in, break up chunks a bit with a large spoon.