Thank you for building this. I have been meaning to, for a few years.

I would suggest that, like when2meet, this should support coordination without every person having signed up. Perhaps require 1 person to have an account to host a day's coordination, but allow coordinators lower friction to use that day without signup. Allow account signup to be a convenient upgrade, rather than a minimum required. I support I wish there were view-urls and edit-urls.

I appreciate that you don't hint at marketing emails permission, nor have early signs of turning this into a business like ToS or Privacy Policy. It would however be comforting, clarifying, to share about the person or entity developing and hosting this.