Toss the peeled and cored apples in the slow cooker base with the lemon juice and toss well.
Drizzle the maple syrup and cinnamon spices over the top and toss again.
Set the slow cooker on low and cook for 2-3 hours.
Then mash the apples with a potato masher and cook for another 1 hour on low.
Mash again, or puree in a blender.
Serve warm, cold or freeze.