Candy apple slices, like most fruit-based treats coated in a sugary syrup or candy shell, have a limited shelf life due to the moisture content in the fruit. Keep in mind that the specific shelf life of candy apple slices can vary depending on factors such as the freshness of the apples, the thickness of the candy coating, and how well they are stored. It's always best to consume them as soon as possible for the best taste and texture. If you notice any signs of spoilage, such as mold or an off odor, it's best to discard them.