ios-hig-design

SKILL.md

iOS Human Interface Guidelines Design Skill

Framework for designing native iOS interfaces that feel intuitive, consistent, and aligned with Apple's design philosophy. Based on Apple's Human Interface Guidelines, the definitive resource for apps that integrate seamlessly with iPhone, iPad, and the Apple ecosystem.

Core Principle

Apple's iOS design philosophy rests on three pillars: clarity (every element legible and purposeful), deference (the interface never overshadows the content it presents), and depth (layering, transitions, and realistic motion convey hierarchy and spatial relationships).

The foundation: The best iOS apps internalize this philosophy rather than following HIG rules mechanically. Native components, system conventions, and platform consistency aren't constraints---they're the reason iOS users trust and enjoy apps that feel like they belong.

Scoring

Goal: 10/10. Score 1 point per satisfied row of the Quick Diagnostic (6 rows), plus up to 4 points for native idiom: +1 semantic colors/text styles throughout (no hardcoded values), +1 system controls over custom reimplementations, +1 standard gestures and meaningful haptics, +1 SF Symbols and correct app-icon shape. Bands: 9-10 = native, accessible, adapts to Dark Mode and Dynamic Type, zero foreign patterns; 5-6 = works but leaks Android idioms or hardcodes color/size; <=3 = fails safe areas, touch targets, or VoiceOver. Always state the score and the specific improvements needed to reach 10/10.

iOS Design Framework

1. Layout & Safe Areas

Core concept: iOS devices have specific screen dimensions, safe area insets, and hardware intrusions (notch, Dynamic Island, home indicator) that every layout must respect.