Wash the apples thoroughly.
Peel, core, and slice the apples into small chunks.
In a large pot, combine the apple chunks, water, and lemon juice.
Heat the pot over medium heat until the mixture begins to simmer.
Cover the pot and let the apples cook for about 20 minutes, stirring occasionally.
Once the apples are soft, remove from heat.
Use a potato masher or immersion blender to mash the apples until smooth or chunky.
Stir in the sugar and cinnamon, adjusting to taste.
Return to low heat for an additional 5 minutes.
Remove from heat and let cool before serving or storing.