App Designer

Turn your iPhone, iPad or Mac into a powerful Swift development environment.

App Designer lets you write, run, preview, organize, and debug Swift code directly on your device — completely offline and without Xcode. Build SwiftUI, UIKit, and RealityKit projects with live code execution, a built-in canvas preview, professional editing tools, Xcode project import/export, and an integrated AI assistant that can work offline or with your own online provider.

Write Swift Anywhere

Run Swift code instantly and see real-time output while you build. Preview SwiftUI and UIKit interfaces side by side with your code and bring your ideas to life directly on your device.

Professional Code Editor

Enjoy syntax highlighting with 89 color themes, smart autocomplete for Swift, SwiftUI, and UIKit, adjustable font size, line wrap, bracket matching, and automatic bracket insertion.

Built-in Debugging Tools

Set breakpoints, step through your code, highlight the current execution line, and view inline errors and warnings directly in the editor.

SwiftUI, UIKit & RealityKit

Create modern SwiftUI interfaces with VStack, HStack, NavigationStack, @State, gestures, animations, and more. Build UIKit views with buttons, labels, Auto Layout, and Core Animation. Explore 3D content with RealityKit, including RealityView, MeshResource, and Entity loading.

Xcode Project Import & Export

Import existing Xcode projects, continue working on the go, and export them back to Xcode when you're ready to keep building on your Mac.

Project & Asset Management

Manage your growing app gallery with folders, multiple pages, sorting options, Spotlight-style search, and an “Only Active” filter. Browse resources with a built-in file explorer, import images and files, add custom app icons, personalize your gallery with wallpapers, and duplicate, rename, or delete projects with ease.

Learn by Example

Start quickly with built-in example projects covering SwiftUI animations, UIKit layouts, file handling, image manipulation, and more.

100% Offline

No internet connection required.

App Designer gives you the tools to build real Swift apps right from your pocket.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/