Preheat your oven to 350°F (175°C). Peel, core, and slice the apples. In a bowl, combine apples, cranberries, half the sugar, and cinnamon. Toss gently and set aside.

In another bowl, mix flour, oats, remaining sugar, cinnamon, and salt. Cut in the butter until it resembles coarse crumbs.

Spread the prepared fruit in a baking dish and sprinkle the topping over it evenly.

Bake for approximately 40 minutes until golden brown and bubbling.

Let cool for about 10-15 minutes before serving with ice cream or whipped cream.