15-20 minutes. Apples should be eaten as soon as possible after peeling, and should not be left for too long, so as not to affect the taste and flavor. Apples can be eaten directly after peeling, and can also be used to make apple juice, dried apples, apple pies, apple milkshakes, apple salads and other delicacies. When preserving peeled apples, you can soak them in clear water or sugar water to avoid oxidation and discoloration of apples.