Does crystl work on Linux or Windows?

No. crystl is macOS only today. It’s a native Swift app and relies on macOS features like the Keychain for secure API key storage.

That said, cross-platform is now on the table. crystl’s terminal core is being rebuilt on a more portable foundation, which clears the biggest technical blocker to a Windows or Linux version. It’s a possibility, not a promise: crystl is built by one developer, and a port only becomes realistic with either more paying subscribers (so I can afford the time) or volunteer contributors. If a Windows or Linux version matters to you, the most direct way to make it happen is to support crystl or pitch in.