Preheat the oven to 400 degrees F.
Chop the Granny Smith apples into bite sized pieces. Place them in a bowl, pour the lemon juice over top and toss together until coated, this keeps the apples from browning. Set aside.
Line a 12X18" pan with foil. Lay out one layer of saltines on the pan and set it aside.
Melt the butter and brown sugar together in a saucepan. Bring mixture to a rolling boil for 3 minutes while stirring continuously. The mixture will thicken and bubble as it caramelizes.
Pour mixture over the crackers evenly and bake in the oven for 7 minutes.
Remove the pan from the oven and immediately sprinkle the semi sweet chocolate chips over the hot toffee.
As they melt, using an offset spatula, spread the chocolate like icing, until the whole surface is covered.
Next sprinkle the green apple pieces and mini pretzels evenly over the warm chocolate.
Heat the caramels in the microwave until melted according to the package instructions, about 30 seconds at a time.
Drizzle the caramel over the top of the apples and pretzels. *feel free to top with sea salt if you want even more of a salty/sweet flavor!*
Place into the refrigerator to cool for about 30 minutes until set, then break off pieces and enjoy!