Redeeming from your iPhone (requires at least OS 3.0)

Below are the screenshots for redeeming your promo code on an iPhone.

These steps do also apply for use on the iPad.

Step 1. Tap the App Store icon from the Home Screen.

Step 2. Navigate to the New section on the Featured tab.

Step 3. Scroll to the bottom of the list to locate and tap the Redeem button.

Step 4. Enter the promo code and tap the Redeem button in the upper right.

Step 5. Tap done on the Thank You screen, then tap the home button to return to the home screen.

Step 6. After a second, you should see the new app installing.

Step 7. When the app is ready, its name will appear. Tap it to launch your new app.

Enjoy!