You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Does Every Marketer Need to Build an App for Mobile? Know Your Target Consumers: An App's a Long-Term Commitment By Melissa Parrish, Published on October 02, 2012 12 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Register Now Already a member? Log in.