Paperless Post uses an online currency called Coins. Coins are used to send mailings that use premium card designs and custom options* such as envelopes, liners and logos.
Coins can be purchased on the website or within the app. Please note that any purchases made within the app are submitted through Apple and cannot be refunded by Paperless Post, as they are processed through the iTunes store.
You can purchase coins through the app by navigating to your Account Settings.
*Not all premium options are available on the app, but are all accessible from the full website on a computer.