Starting with a clear understanding of who's going to use it, what problem the app solves, and which scenario must be addressed in the initial release is key to building iOS apps. A solid discovery phase helps outline the MVP, pick an appropriate architecture, and avoid features that seem impressive on paper but don't enhance actual usage.

After laying the groundwork, attention moves to how the UI behaves, performance, and reliability across different iPhone models and iOS versions. Uniform navigation, careful state management, and well-planned integrations (payments, authentication, analytics, and backend APIs) simplify maintenance and allow the product to scale after it hits the App Store.