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iPhone (iOS) app development creates native applications for Apple devices using Swift or Objective-C. It includes UI/UX design following Apple Human Interface Guidelines, App Store optimization, and ongoing maintenance.
iOS users spend 2.5x more than Android users on average. iPhone apps reach high-value demographics, benefit from Apple's premium ecosystem, and deliver consistent performance across a controlled device range.
Simple iOS apps cost $15,000-$40,000, medium-complexity apps range from $40,000-$100,000, and feature-rich enterprise apps start at $100,000-$300,000+. Costs depend on features, design complexity, and backend requirements.
Select agencies with published App Store successes, strong Swift expertise, Apple design guideline adherence, and proven testing processes. Check their portfolio for similar app categories and post-launch support plans.
Modern iOS development uses Swift programming language, Xcode IDE, SwiftUI or UIKit frameworks, Core Data for storage, and tools like Combine for reactive programming and TestFlight for beta testing.