How to redeem your iOS App Promo Code
Head to the App Store on the device you want to download the app on and tap your avatar in the top right hand corner as shown to navigate to your account page.
Now you've opened your account page, tap the 'Redeem Gift Card or Code' option that is displayed below.
Next, choose the option shown below to enter your code manually.
Type in the code from the front of your voucher here and then hit the 'redeem' button shown in the image.
Once you have hit redeem you will be greeted with a message similar to the one below which means the App has been downloaded and your promo code has been applied. Now all you need to do is open the app and register your account before you can start enjoying hundreds of delicious meals.