It's nothing big. I wanted an offline natural language to cron/cron to natural language translator and I wanted to get some experience building MacOS apps. It's not vibe coded, but I did get good help from Claude since it's my first time building MacOS apps. It's free and no data is collected.

https://cronwise.github.io/

What's it like building native MacOS? SwiftUI or UIKit or?

I used SwiftUI.

I went full TDD with the app so it was easy enough to build the logical parts of it. The UI is fairly simple, but whenever I found that Claude did not understand exactly what I wanted, I gave it a screenshot/image of a design and it did things pretty well.