Designing iOS apps begins with clarity: identifying the target users, the app's purpose, and the problem the initial release must solve. A thorough discovery phase helps define the MVP scope, select the proper architecture, and avoid features that look impressive on paper but don't enhance real usage.

After the foundation is in place, attention shifts to UI behavior, performance, and stability across iPhone models and iOS versions. Consistent navigation patterns, meticulous state management, and well-planned integrations (payments, authentication, analytics, backend APIs) simplify maintenance and scaling after the App Store release.