Wash and peel the medium apples and peaches. Core the apples and pit the peaches, then chop both into small, even pieces.

In a medium saucepan, combine the chopped apples, peaches, and water. Place over medium heat and bring to a gentle boil.

Once boiling, reduce the heat to low and let simmer for approximately 20 minutes, stirring occasionally.

Remove from heat and transfer the mixture to a blender. Puree until desired smoothness is reached.

Allow to cool to room temperature before transferring to jars or airtight containers for storage.