Columbus start-up JoeMetric, is poised to track the world's consumers, one smart phone at a time, with its new iPhone application. Pending approval by Apple, JoeMetric was poised at the end of 2009 to offer its smart phone app, JoeSurvey, free to iPhone users. The users can then take targeted surveys through the app and get paid for their responses. JoeMetric makes money when marketers sign up to use their application to question consumers about their shopping habits or to get feedback instantly about events or advertising, the company says. After their planned launch in January 2010, JoeMetric planned to add between three and six employees to its current two.