How do I transfer favorites from the free iPad app to the premium iPad app?

Our free and premium apps are separate apps, so, unfortunately, your favorite words cannot be transferred between the two apps. 

You can, however, transfer them from the same version of the app between devices.

You can use Apple's iCloud services to store your app preferences. It does a variety of other things, including email, cloud syncing, but the feature you want is the ability to save some app data. Here is a link for more information:

https://support.apple.com/kb/PH2608?locale=en_US

You can go into your favorites by tapping the ⭐️icon in the top left-hand corner, then select "View all." In the middle of the top part of the screen, you will see the option to "Sync with iCloud." iCloud will store your favorites and move them from app to app, but be sure to manual sync it periodically.