Home panel is a private app used by a single household. Only that household's own Google accounts sign in to it.
With the household's permission, it reads the household's Google Calendar events and, for calendars the household owns, creates and updates events.
Access can be withdrawn at any time under Google Account › Security › Third-party apps with account access. Deleting the app's local data on the household's computer removes everything it has stored.
Questions can be raised through the GitHub account that publishes this page.