In this episode, we break down Feature-Oriented Architecture on iOS and how it scales real-world apps by slicing them into modular, independent features. We’ll talk about how FOA complements patterns like MVVM, TCA, and Clean Architecture, so you get both vertical feature modules and clean horizontal layers for testability and maintainability, and we'll demonstrate the concept using an example To-Do app that manages to-do "task" objects. By the end, you’ll have a mental model you can apply directly to your own production codebases.