Any one of thousands of potential software applications that can be activated on a mobile device, such as an iPhone or a Blackberry. These downloadable tools allow users to turn their PDAs into handy devices that meet their very specific, idiosyncratic needs.
Application must have a regular (daily or weekly) reason for use Should have easy interfaces with social networks such as Facebook or Twitter Include a survey function to gauge satisfaction and collect intelligence for the next release (iPhone Apps collect active user feedback and will make an impact on the number of downloads)