Love the idea -- I recently started capturing more and more data on my own life. But I have an Android phone .. haven't seen any other mentions of Android options on this thread so I thought I'd throw this one out there... EvenTrend ( http://code.google.com/p/eventrend/ ) is a pretty neat freeform personal data tracker. It lets you enter data, will generate pretty graphs, and even calculates some correlations (strong <-> weak, positive/negative). The data can be anything you can put a number on. It also allows aggregation -- you can tell it to only store a sum or average for a particular field for some period: e.g., I want to know how much time I spend exercising per day.