One of my favorite new iOS applications is Reporter by Nicholas Felton. Reporter collects data about the user's daily routine through incredibly simple and unobtrusive surveys (which are fully customizable). Reporter then takes this data and displays it to the user through a very simple and pleasant interface, as well as making the data available as CSV or JSON formats. I have been using the app for a few days now and am impressed at how Reporter managed to make data entry effortless and even fun – something that is not true of most personal analytics apps. I highly recommend purchasing it via this link for just under four bucks.