The Newborn Nutrition Reference Application, developed from the Newborn Nutrition Digital Adaptation Kit (NNDAK), utilizes Human-Centered Design to improve healthcare for vulnerable infants by tracking and optimizing their feeding. It features data collection, visualization, and growth charts based on INTERGROWTH-21ST fetal weight data. The application provides mothers and healthcare providers with real-time information to enhance newborn nutrition and supports decision-making. Complying with WHO's SMART guidelines and Principles for Digital Development, it emphasizes effective design, deployment, and sustainability. Built on Google's Android Fast Healthcare Interoperability Resources SDK, the NNDAK aims to efficiently deliver lifesaving milk to newborns, focusing on maternal and child health.