Where do I enter my promo code?

Promo codes must be entered on the checkout screen in order to be applied to your order. 

On iOS:
The 'Promo Code' field may be found on the checkout screen between your contact information and the price breakdown.

On Android:
The Promo Code field may be found by tapping on the 'Have a promo code?' link between 'Payment Information' and 'Paper Type' on the checkout page. Type in the code on the dialog window that opens and tap 'Apply' to finish adding your code.