Show HN: Availability tracker for people and projects in different timezones (worldtimeclock.pro)

Hi HN,

I made this to scratch my own itch to never calculate timezone math by hand and solve it with a visual approach. World clock apps are about locations so I made this one about people and projects. The app is local-first, all data stays on your device, no sign up needed and now it's free.

Let me know what you think, any feedback is appreciated!