A private, single-user tool. Not a product, not open to sign-ups.
karajan-calendar is a personal application built and run by Miguel Cabañas for his own use. It reads his own calendars and writes a plain-text summary of the next few months to a private server he owns, so that his personal assistant software can answer questions such as “what do I have on Thursday?”.
It requests a single Google permission,
https://www.googleapis.com/auth/calendar.readonly, which is
read-only. The application cannot create, modify, delete or
respond to calendar events, and no part of it is designed to.
There is no sign-up. The only user is the owner of the application.