I upgraded from Action Names to Agendus 6 (the software changed names, added features). My upgrade was $7.50. The upgrade was $10 but I got 25% off in an email from iambic. I can't say enough about the upgrade cost of Palm OS software. It is a pretty big upgrade feature wise to boot! They added a "Today" screen ala Pocket PC 2002. If you still use the built in Address Book and Date Book apps you should check out Agendus 6!