Thinking of Creating a "Lite" Version

I'm thinking of creating a "lite" version of Mood Sentry.  The lite version would not have the Tools feature and would be free.  It would have the References  My Experiences, and Reminders functions only.  The user would be able to tailor the Manifestations and Mitigations of the cognitive distortions in the My Experiences section, and would be able to tailor the reminders to her own needs.  I think this would give the user a chance to try the main features of the app and see if it fits her therapy program before buying.  What do you think?