You can find more help at m/czodroid.
This app saves contacts in its own database seperate from android contacts.
With the permission of HP, the Advanced User Guide has been scanned into a pdf and made available at www.
From here, the user can do whatever they normally would do with this file such as simply store the program for archival purposes, download this file into a real HP 48 calculator, share it with a friend to load into their own Droid48, or post.
So, keep your contacts safe in a different database.
As another example, the user can read a large stand-alone file that is an HP 48 directory file, navigate to an algebraic equation, then share this algebraic equation via email (requires a separate Android email program that supports sharing).