How do I add or edit shipping addresses?

For iOS:

You may add a saved address by tapping the 'Account' tab in the menu at the bottom of the screen and selecting the 'Shipping Addresses' option. Tap on 'Add New Address' at the bottom of the screen to add a new address or tap any of your saved addresses to edit or remove them. While editing an address, there will be a toggle to mark a single address as your 'Primary Address'- this will be the default shipping address that is loaded during checkout. 

For Android:

Shipping addresses can be edited during checkout only.

To add an address:
Tap on '+ Add a Recipient', enter the shipping address, and tap 'Save' on the top right side of the screen.

To edit an address:
Tap on the Name of the recipient that needs to be edited. From here, you can either edit the recipient details or delete the recipient altogether, which will take you back to the 'Checkout' page. From there, you can then proceed to '+Add a Recipient'.