Plenty of SMBs use Google Analytics to track website data, and the zero price tag is just one of the many reasons for its popularity. The ability to take that data with you on a smartphone or tablet is increasingly critical. Paid apps like Droid Analytics and Analytix are getting competition from a newer tool, gAnalytics. It's still in beta, but it's free--like Google Analytics. If you're a Google Analytics die-hard and haven't mobilized your data, try kicking this app's tires.