What problem does it solve? Designing iOS interfaces that feel native requires deep knowledge of Apple's Human Interface Guidelines, and teams often ship apps with broken safe areas, missing Dark Mode support, non-native navigation patterns, or accessibility failures that erode user trust. ## Core Features & Use Cases - HIG Design Framework: Eight structured principles covering layout and safe areas, typography and Dynamic Type, semantic colors and Dark Mode, navigation patterns, native controls, accessibility, SF Symbols, and gestures with haptics. - Scoring and Audit System: Rate any iOS interface or SwiftUI/UIKit code from 0-10 against HIG principles, with a quick diagnostic checklist identifying specific fixes needed to reach 10/10. - Deep Reference Library: Eleven reference documents covering components, keyboard input, privacy permissions, widgets, Live Activities, Siri, Shortcuts, Handoff, and system integration. - Use Case: When building a new iPhone app screen with a tab bar, navigation stack, and form inputs, use this Skill to verify touch targets are 44pt, safe areas are respected, semantic colors support Dark Mode, and VoiceOver labels are complete. ## Quick Start Review my SwiftUI profile screen code against Apple Human Interface Guidelines and score it from 0 to 10 with specific fixes.