Michele and David explore the ideas and design principles behind the Open App Builder, a system developed through IDEMS’ collaboration with Parenting for Lifelong Health (PLH). They discuss the challenges of creating flexible, reusable app infrastructures that support collaboration across technical and non-technical teams, and reflect on the long-term vision of enabling local organisations to build and adapt their own digital tools. The conversation highlights both the complexity of the system and the growing opportunities emerging as it matures and expands into new contexts.