Mobile applications are often perceived as lightweight clients that consume backend services and render user interfaces. This perspective underestimates the complexity of modern mobile systems, particularly in iOS applications where real-time interactions, offline capabilities, and performance constraints demand far more than simple data consumption. As applications scale in features and usage, they begin to exhibit characteristics typically associated with backend systems, including state orchestration, caching strategies, concurrency control, and failure handling. Treating mobile applications as distributed systems rather than passive clients provides a more accurate model for designing scalable and resilient architectures. The traditional separation between frontend and backend assumes that the backend owns business logic and data consistency, while the frontend is responsible for presentation. In practice, this boundary has become increasingly blurred.…