Modern iOS Architecture deconstructs the engineering decisions behind a hybrid mobile application inspired by MemeArcade. Hassan Uriostegui shows how to design modular iOS software with SwiftUI, Combine, Swift Package Manager, async/await, persistence, WebViews, local notifications, and observability. Through architecture maps, practical trade-offs, and reader activities, this book helps iOS developers define boundaries between native and web code, protect trust and lifecycle seams, and turn production lessons into reusable modules. It is a practical guide for engineers building maintainable mobile products—not a source-code dump or a claim to reveal private product implementation.