Your app will not be able to access all offers when it does not have a network connection. For coupons you're sure to want to have access to when you're offline, we strongly recommend using the Favorites feature.
To quickly Favorite merchants, tap the little heart that appears in the right of your screen, while viewing any list. You'll see that once you Favorite a merchant the heart turns from grey to orange.
From your home screen you can jump right to your Favorites by tapping the Favorites tile.