Learn Swift: Build iOS Apps

About this app

Learn Swift by writing it. This Swift programming course pairs every short lesson with code you edit and run in the built-in editor, so the language sticks instead of staying theory. Start from zero or pick up where you are: the path goes from your first let and var to protocols, generics, SwiftUI and the tools real iOS apps are built with. SWIFT PROGRAMMING, STEP BY STEP • 122 courses and 409 short lessons, from beginner (A1) to advanced (C2) • Basics: variables, types, strings, operators, loops, switch and pattern matching • Optionals done right: optional binding, guard, optional chaining and nil coalescing • Structs, classes and enums, value vs reference types, protocols and extensions • Closures, higher-order functions, generics, property wrappers and result builders • Error handling, Codable and JSON, dates, file I/O and the Swift Package Manager • Concurrency explained: async/await, structured concurrency, task groups, actors and Sendable • Memory management and ARC, unsafe pointers, macros and performance SWIFTUI AND IOS APP DEVELOPMENT • SwiftUI tutorial: views, modifiers, state, stacks, grids, bindings, environment, animations and custom layouts • iOS topics: UIKit in SwiftUI, Core Data and SwiftData, URLSession networking, Core Location and MapKit, push notifications, widgets and app extensions, Keychain, localization • Architecture: MVVM, coordinators, dependency injection, clean architecture and TCA • Testing and shipping: XCTest, Instruments profiling, distribution and CI • Server-side Swift with Vapor, plus Combine fundamentals SWIFTUI PLAYGROUND • Write a view and see a live preview on your phone, no Mac needed to experiment • Stacks, text, buttons, images, lists and @State are rendered on the device • Unsupported syntax is reported with the line number, so you always know why CODE EDITOR AND SWIFT COMPILER • Write code in the editor and run it on a Swift compiler in the cloud (internet required) • The editor runs command-line Swift; screens are previewed in the SwiftUI Playground • Tap a compiler error to jump to the line and get a plain explanation of how to fix it • Save your code and come back to any lesson later PRACTICE, PROJECTS AND INTERVIEW PREP • 60 coding missions, from easy to hard • 20 guided projects and 6 multi-step build-along projects • 50 quiz questions with an explanation for every answer • 50 Swift interview questions for iOS developer job prep, plus a daily interview question • A 77-entry cheat sheet to look up syntax fast • Swift Recall: the questions you miss become flashcards, reviewed with spaced repetition • World Coding Challenge: three global coding rounds every day AI MENTOR • Stuck on optionals or a compiler error? Ask the AI Mentor and get a clear answer in seconds • Free users get one AI Mentor question a day; Pro removes the limit CERTIFICATE • Pro members can take the final exam and earn a certificate of completion WHO IT'S FOR • Beginners learning their first programming language • Web or mobile developers moving to iOS development • Students and developers preparing for iOS developer interviews • Anyone who wants hands-on coding practice on the phone The app is available in 22 languages. FREE AND PRO Free to start: the first course, the first guided project, two missions, the playground basics, daily Recall practice and one AI Mentor question a day are free. The free version shows ads. Pro unlocks every course, project and mission, the full playground, the certificate exam and unlimited AI Mentor, and removes ads. Apple, iOS, Swift, SwiftUI, Xcode and UIKit are trademarks of Apple Inc. This app is an independent learning tool and is not affiliated with or endorsed by Apple. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.coddykit.com/terms/privacy-policy

What's new: • Attach screenshots when you contact us, so we can help faster. • Find our answers under Profile → My Requests — you'll get a notification when we reply. • Design refinements, bug fixes and performance improvements.

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1. First observed Aug 6, 2026 · 2:17 PM Free