Mobile app development may seem inexpensive, but it's not. While there are low-cost development tools and frameworks, apps require ongoing support and updates, and labor costs are high. Moreover, the cost of app development is a drop in the bucket compared with the cost of powering apps through infrastructure that taps into real-time information and services. Application development and delivery leaders must carefully plan a business case that captures the benefits, total costs, and risks of mobile development. This report lays out the steps in that process.