Preheat oven to 375°
Combine oats, brown sugar, flour and cinnamon, cut in butter until mixture resembles coarse crumbs. Set aside.
Unroll pie crusts, carefully fit pie crusts into 9" springform pan, overlapping pie crusts to fit.
Cut off any overhanging crust.
Top crust with apple pie filling.
Drizzle with 1/4 cup caramel sauce.
Sprinkle with the crumble topping, pat topping down lightly.
Bake in preheated oven for 50 to 60 minutes.
Remove from oven, cool in pan on wire rack for 15 minutes.
Run a butter knife around inside of the springform pan.
Carefully remove sides of springform pan.
Cool slightly before serving.
Serve with vanilla or cinnamon ice cream.