Mobile Development Skill — Quick Reference

This skill equips mobile developers with execution-ready patterns for building native and cross-platform mobile applications. Claude should apply these patterns when users ask for iOS/Android app architecture, UI components, navigation flows, API integration, offline storage, authentication, or mobile-specific features.

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When to Use This Skill

Claude should invoke this skill when a user requests:

• iOS app development (Swift, SwiftUI, UIKit)
• Android app development (Kotlin, Jetpack Compose)
• Cross-platform development (React Native, WebView)
• Mobile app architecture and patterns
• Navigation and routing
• State management (Redux, MobX, MVVM)
• Network requests and API integration
• Local data storage (Core Data, Room, SQLite)
• Authentication and session management
• Push notifications
• Camera and media access
• Location services
• App Store / Play Store deployment
• Mobile performance optimization
• Offline-first architecture

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Quick Reference Table

Task	iOS	Android	Cross-Platform	When to Use
Native UI	SwiftUI + UIKit	Jetpack Compose + Views	React Native	Native: Best performance; Cross-platform: Code sharing
Navigation	NavigationStack	Navigation Component	React Navigation	Platform-specific for native feel
State Management	@State/@Observable	ViewModel + StateFlow	Redux/MobX	iOS: @Observable; Android: ViewModel; RN: Redux
Networking	URLSession + async/await	Retrofit + Coroutines	Axios/Fetch	Native: Type-safe; RN: JavaScript ecosystem
Local Storage	Core Data + SwiftData	Room Database	AsyncStorage/SQLite	Native: Full control; RN: Simpler
Push Notifications	APNs	FCM	React Native Firebase	Native: Platform-specific; RN: Unified API

Decision Tree: Platform Selection

Need to build mobile app for: [Target Audience]
    ├─ iOS only?
    │   └─ Use Swift + SwiftUI (templates/swift/)
    │
    ├─ Android only?
    │   └─ Use Kotlin + Jetpack Compose (templates/kotlin/)
    │
    ├─ Both iOS and Android?
    │   ├─ Need maximum performance?
    │   │   └─ Build separate native apps (Swift + Kotlin)
    │   │
    │   ├─ Need faster development + code sharing?
    │   │   └─ Use React Native (templates/cross-platform/)
    │   │
    │   └─ Wrapping existing web app?
    │       └─ Use WebView wrapper (templates/cross-platform/template-webview.md)

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Navigation

Resources

• resources/ios-best-practices.md — iOS architecture, concurrency, testing, and performance
• resources/android-best-practices.md — Android/Kotlin architecture, coroutines, Compose, testing, performance
• README.md — Folder overview and usage notes
• data/sources.json — Curated external references by platform

Templates

• Swift: templates/swift/template-swift.md, templates/swift/template-swift-concurrency.md, templates/swift/template-swift-combine.md, templates/swift/template-swift-performance.md, templates/swift/template-swift-testing.md
• SwiftUI: templates/swiftui/template-swiftui-advanced.md
• Kotlin/Android: templates/kotlin/template-kotlin.md, templates/kotlin/template-kotlin-coroutines.md, templates/kotlin/template-kotlin-compose-advanced.md, templates/kotlin/template-kotlin-testing.md
• Cross-platform: templates/cross-platform/template-platform-patterns.md, templates/cross-platform/template-webview.md

Related Skills

• ../software-frontend/SKILL.md — Web-facing UI patterns and Next.js integration
• ../software-backend/SKILL.md — API design, auth, and backend contracts for mobile clients
• ../software-testing-automation/SKILL.md — Mobile CI, test strategy, and reliability gates
• ../quality-resilience-patterns/SKILL.md — Resilience patterns for networked mobile apps

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Operational Playbooks

• resources/operational-playbook.md — Mobile architecture patterns, platform-specific guides, security notes, and decision tables