Swift
Apple's modern programming language for building apps across iPhone, iPad, Mac, Apple Watch, and beyond.
At a Glance
2014
Year released
Apple
Creator
Open
Source since 2015
iOS
Primary platform
History
Apple's Modern Replacement for Objective-C
Before Swift, iOS and macOS developers wrote code in Objective-C — a language that dates back to the early 1980s and carries a famously unwieldy syntax. Apple spent years quietly developing a successor. In 2014, Swift was unveiled at WWDC to immediate excitement. It was faster, safer, and dramatically more readable than Objective-C while compiling to the same native code.
Apple open-sourced Swift in 2015, a signal that they wanted it to grow beyond their own platforms. The language has since seen rapid evolution — annual releases add new features, the compiler has become significantly faster, and Swift Package Manager has matured into a capable dependency tool. SwiftUI, introduced in 2019, further lowered the barrier to building Apple platform apps by replacing the older UIKit framework with a declarative, composable approach.
Swift is now the standard for Apple platform development. Objective-C still exists in older codebases, but new iOS projects start in Swift. With AI tools able to write fluent SwiftUI code, building a native App Store app on a domain name has never been more accessible for non-developers.
Why Builders Use It
Turn a Domain Into an App Store Product
For domain investors, Swift represents a specific opportunity: building native iOS apps that use your domain as the brand. A domain like FocusTimer.app or BudgetKit.io gains significant value when paired with a real App Store listing — you're selling not just a name but a product and an audience.
SwiftUI in particular is a strong pairing with AI tools. The declarative syntax — where you describe what the UI should look like rather than how to draw it — generates clearly readable code that AI handles well. Beginners can iterate on AI-generated SwiftUI layouts and get real apps running on a simulator within hours of starting.
Apple's App Store also has established monetization patterns: subscriptions via StoreKit, one-time purchases, and freemium models. Building a small iOS utility on a strong domain can create a recurring revenue stream that makes the domain far more valuable than if it were parked.
Resources
Useful Links
Swift.org
Official Swift language site — documentation, downloads, and evolution proposals.
Apple Developer — Swift
Apple's own Swift resources, sample code, and WWDC session videos.
Hacking with Swift
Paul Hudson's free Swift learning site — 100 Days of SwiftUI is one of the best structured courses available.
Xcode
Apple's IDE for Swift development. Free on the Mac App Store. Required for building iOS apps.
Content Creators
Learn from the Best on YouTube
Sean Allen
Practical SwiftUI and UIKit tutorials from a working iOS developer. Great mix of beginner content and career advice.
Paul Hudson
Creator of Hacking with Swift and the 100 Days of SwiftUI course. One of the most thorough Swift educators in the community.
CodeWithChris
Beginner-focused iOS development tutorials — ideal if you've never written Swift before and want a gentle starting point.
Ready to build with Swift?
Our tutorials show you how to turn a domain into a live product using AI tools.