Add the apples to a large saucepan, add the water, sugar and cinnamon and toss until well combined.
Bring to a boil, then cover and simmer for 20-30 minutes - until apples are tender and soft.
Depending on how thick/thin you like it - drain off some of the liquid and reserve.
Use an immersion blender or food processor and blend until smooth. Add leftover liquid as needed to get your ideal consistency.
Devour.
Notes
Add some strawberries and cook along with the apples, or add some canned peaches to the mix right before you blend for a delicious way to change it (adjust the cinnamon or leave it out).
You can use brown sugar, honey, agave, or maple syrup in place of sugar.
Keep in the fridge for up to 7 days in a sealed container.