Use the menu at the bottom to navigate though reports, insights and settings:
Insights: Discover combinations of activities that drive your mood up or down, and discover which activities make you feel better or worse.
Dashboard: See your mood charts for the day, week and month.
Moods: view your moods and edit or delete any entry.
Account & Settings: This is the area that allows you to edit your list of custom activities, import or export your moods, set a reminder, etc.