Promo Pusher is a tool for developers to manage and distribute promo codes.
Promo Pusher can help you quickly send someone a promo code for any of your apps. It tracks which codes have been sent, and to whom, and shows when a batch of codes is about to expire.
Create a text document with the promo codes you wish to manage, and transfer the document to Promo Pusher on your iOS device using iTunes. You must obtain those codes manually, using the normal iTunes Connect web interface.
Use Promo Pusher to distribute codes via email or Twitter.