Mobile Development Skill

Quick Reference

Learning Paths

iOS Development

[1] Swift Fundamentals (4-6 wk)
 │  └─ Types, optionals, closures, protocols
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[2] SwiftUI (4-6 wk)
 │  └─ Views, modifiers, state, binding
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[3] Navigation + Data (3-4 wk)
 │  └─ NavigationStack, SwiftData/Core Data
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[4] Networking + Async (2-3 wk)
 │  └─ URLSession, async/await, Combine
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[5] Testing + App Store (2 wk)
    └─ XCTest, TestFlight, submission

2025 Stack: Swift 5.10 + SwiftUI + SwiftData + Xcode 16

Android Development

[1] Kotlin Fundamentals (4-6 wk)
 │  └─ Null safety, coroutines, data classes
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[2] Jetpack Compose (4-6 wk)
 │  └─ Composables, state, effects
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[3] Architecture (3-4 wk)
 │  └─ MVVM, Room, Navigation
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[4] Networking + DI (2-3 wk)
 │  └─ Retrofit, Hilt, Flow
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[5] Testing + Play Store (2 wk)
    └─ JUnit, Espresso, release

2025 Stack: Kotlin 2.0 + Jetpack Compose + Room + Hilt

Flutter (Cross-Platform)

[1] Dart Fundamentals (2-3 wk)
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[2] Flutter Widgets (3-4 wk)
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[3] State Management (2-3 wk)
 │  └─ Riverpod or Bloc
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[4] Backend Integration (2 wk)
 │  └─ Firebase, REST APIs
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[5] Deploy to Both Stores (1 wk)

2025 Stack: Flutter 3.x + Dart 3.x + Riverpod + Firebase

Game Development

[1] Game Basics (4-6 wk)
 │  └─ Game loop, input handling
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[2] Unity/C# Fundamentals (6-8 wk)
 │  └─ GameObjects, Components, Scripts
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[3] Physics + Graphics (4-6 wk)
 │  └─ Rigidbody, colliders, shaders
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[4] Audio + Polish (2-4 wk)
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[5] Publish (ongoing)
    └─ Steam, App Store, Play Store

2025 Stack: Unity 6 LTS + C# OR Unreal 5.4 + C++

Platform Decision Tree

Which platform?
│
├─► Apple ecosystem only?
│   └─► iOS (Swift + SwiftUI)
│
├─► Android ecosystem only?
│   └─► Android (Kotlin + Compose)
│
├─► Both platforms?
│   ├─► Performance-critical? → Native for both
│   ├─► Budget/time limited? → Flutter
│   └─► Web developer background? → React Native
│
└─► Making games?
    ├─► 2D/3D indie → Unity
    ├─► AAA quality → Unreal
    └─► Simple 2D → Godot

Game Engine Comparison

Troubleshooting

Native vs Cross-platform?
├─► Need platform-specific APIs (HealthKit, ARCore)? → Native
├─► Performance-critical (AR/VR, complex animations)? → Native
├─► Budget or time limited? → Flutter
├─► Team knows JavaScript? → React Native
└─► Starting from scratch? → Flutter (best DX)

Simulator works, device doesn't?
├─► Missing entitlements/capabilities?
├─► Different iOS/Android version?
├─► Network connectivity issues?
└─► Always test on real devices from day 1

App rejected by store?
├─► Read rejection reason carefully
├─► Check App Store Review Guidelines
├─► Most common: metadata issues, crashes, spam
└─► Appeal if unjustified

Common Failure Modes

Portfolio Projects

Mobile (Progressive)

1. Todo App – CRUD basics
2. Weather App – API integration
3. Chat App – Real-time, auth
4. Payment App – Stripe, security

Games

1. 2D Platformer – Physics basics
2. 3D Runner – 3D graphics, particles
3. Multiplayer Game – Networking

Next Actions

Specify your target platform for a detailed learning plan.