Small iOS utility app that allows you to quickly convert a song link from a platform to another.
As an example, when a friend sends you a Spotify link, you can share it with the Crossfade app and it will automatically open for you the same song on Apple Music or whatever platform you are using.

It's built fully in SwiftUI, using SwiftData for the storage layer.
The hardest bit has been doing the onboarding screen to illustrate how to use the app from the system share sheet.

The minimal website is plain html & css.