Add a story to Your Favorites while on Wi-Fi, and it will automatically download - so you can listen wherever, whenever.
Not sure how to add a story to your Favorites? Just look for the heart icon next to a story anywhere in the app (example below on the listen screen).
As long as you're on WiFi, stories added to Your Favorites will download automatically, so you can listen to them offline.
You can access all of your favorites by heading to the Your Stories tab, and then tapping the Your Favorites playlist.