The enormous global growth of mobile phone access presents an opportunity for funders, such as philanthropies and other development agencies, to easily connect, communicate, and listen to their clients and end-users. As shown by a pilot conducted by The Rockefeller Foundation with its grantee, Viamo, a well-designed interactive voice response (IVR) mobile survey can result in fast, cost-effective, and, importantly, actionable feedback from the field, even from the most distant and remote areas. And, while mobile data collection will not replace the more face-to-face, text, or online survey approaches critical to measurement and evaluation data gathering, it does add another analytical tool organizations can use to quickly assess what is and is not working in delivering their results.