<p>One of the toughest marketing jobs today is working for an app developer. With app downloads projected to surpass 66 billion by 2016 (more than double the 31 billion apps installed in 2011), more often than not marketers are targeting smartphone users, who are expected to drive the majority of mobile downloads.</p><p>The bad news: the vast majority (68%) of smartphone users open only five or fewer apps at least once a week. So, what's a marketer to do?</p><p>Text messaging is one of the most effective direct marketing channels to attract new users as well as to increase engagement with existing customers, according to a recent study by Peggy Anne Salz, editor of MobileGroove.</p><p>SMS is especially important for marketers who use a freemium modelfor which engagement is criticalto monetize their apps. Their businessmaking money via in-app purchasesrelies on how well they can keep customers coming back to purchase more features, levels or other functionality they find valuable.</p><p><a href="http://www.marketingprofs.com/articles/2013/10672/how-text-messaging-can-drive-app-engagement-and-revenues">Keep reading...</a></p>