We are designing, developing, and deploying an innovative and feasible mobile solution for collecting infant and caregiver observations of daily living (ODLs), sharing these data with their clinical providers, and visualizing and summarizing these data for both the parents and clinicians caring for these children. This system, called Estrellita, has been shown to be helpful in preliminary pilot studies, and now we are expanding its capabilities and evaluating Estrellita in a longitudinal field deployment.