Does SwiftUI cost money?

You can install Xcode 11 for free through Apple’s developer website. If you are running macOS Mojave, you can use SwiftUI without the live preview and design canvas features. If you want to use these features, you will need to install the beta version of macOS Catalina which requires a paid developer account.12 Eyl 2019

1) Download the latest version of Swift: In order to install Swift 4.0. 3 on our MacOS, first we have to download it from its official website https://swift.org/download/ . We download the latest version that will be downloaded as a package file on the computer which can be installed easily by terminal.

This is an open source project of the Windows 11 desktop client implemented using SwiftUI.