Toss the apples into the Crockpot. (Add sugar now too, if you want to sweeten it)Cook on low for 4-6 hours or until apples are very soft, stirring every hour or two.When the apples are cooked through, puree them in a blender or food processor, for a thin applesauce. Depending on the size of your processor, you may need to puree in several batches. For a chunkier applesauce, mash the apples with a potato masher. If you find your applesauce is too thick just add water, 1 tablespoon at a time, until it reaches the desired consistency.Store in covered containers. If freezing, place in a freezer safe container until ready for use.