This document summarizes the use of mobile data collection in surveys conducted in Malawi, Ethiopia, and Rwanda to evaluate community health supply chains. Key points: - Surveys were conducted at various system levels using EpiSurveyor and Magpi on smartphones to electronically collect quantitative and qualitative data. - Mobile data collection saved time and costs compared to paper. Real-time data visibility improved data management and quality. - Lessons learned include the importance of network capability and sufficient data storage. Forms need to be designed carefully and testing is important. - Recommendations include assessing network coverage, starting early to adapt paper surveys, keeping forms short, designating a strong data manager,