Finding the right SwiftUI reference app can significantly speed up your iOS development workflow. Whether you're learning SwiftUI fundamentals, comparing UI components, or building production apps, having a comprehensive reference guide at your fingertips is essential. We've compiled the best SwiftUI reference apps to help you choose the perfect tool for your development needs.
#1
Catalog
Editor's Choice
Pros
✓Comprehensive SwiftUI component library with live interactive previews for instant learning
✓Organized reference documentation covering layouts, modifiers, and UIKit-to-SwiftUI mapping
Cons
−Some advanced component examples require premium subscription to unlock
−Offline access is limited compared to some web-based alternatives
Verdict
Catalog is the best choice for iOS developers who want a dedicated, interactive SwiftUI reference app with hands-on examples and clear component documentation. Perfect for both beginners and experienced developers seeking quick syntax lookup.
#2
Apple Developer Documentation
Pros
✓Official Apple reference with guaranteed accuracy and latest SwiftUI updates
✓Extensive code samples and integration with Xcode for seamless workflows
Cons
−Web-based interface requires internet connection and browser navigation
−Dense technical writing can be overwhelming for beginners learning SwiftUI basics
Verdict
Best for developers who prefer official documentation and need the most current API specifications. Ideal as a secondary resource alongside interactive learning tools.
#3
Hacking with Swift
Pros
✓Tutorial-focused content with real-world project examples and practical use cases
✓Free access to most content with optional paid courses for advanced topics
Cons
−Tutorial format is less effective for quick reference lookups compared to component libraries
−Mobile experience requires navigating between multiple pages for specific topics
Verdict
Ideal for learners who prefer guided tutorials and step-by-step projects over reference material. Great for building foundational SwiftUI knowledge through practical examples.
#4
SwiftUI by Example
Pros
✓Clean, searchable reference with 100+ SwiftUI examples organized by topic
✓Lightweight web interface with no app installation required
Cons
−Limited to web access only with no native mobile app for offline reference
−Minimal visual previews compared to interactive code playgrounds
Verdict
Good for developers who want a quick web-based reference without installing another app. Best used as a supplementary resource for syntax lookup.
👑 Editor's Choice
Catalog
Alok Singh
3.0
10K+
"Catalog stands out as the best SwiftUI reference app because it combines interactive component previews with organized documentation specifically designed for iOS developers. Unlike web-based alternatives, Catalog offers a native app experience with live code execution, making it the fastest way to understand SwiftUI components and compare them with UIKit equivalents."
