This Low Calorie Apple Pie is just 155 calories! It's easy and impressive, and tastes juts like the full fat version. I used an all-natural zero calorie sweetener to make this recipe. But if you choose to use regular sugar, it will only reside the calories by 11 calories per slice. Special Tip: Be sure to click the link below for the low calorie pie crust, it's easy and delicious.