Steps to Redeeming a Promo Code in the App Store:
1. Go to the App Store.
2. Once you’re in the App Store, scroll to the bottom of the page.
3. When you get to the bottom of the page, tap on the button that says “Redeem”.
4. A window will appear. Enter your promo code in the text box, as depicted below.
5. Once you have entered the code, hit “Redeem”.
6. Congrats! Your app will being downloading.