ccal

What this is

seeCal puts every calendar a person has on one day: a Google account, a Microsoft 365 or Outlook account, and public feeds such as holidays. ccal is the part that runs on the internet. It finishes each sign-in with Google or Microsoft, reads the calendars it is asked to read, and works out the day from them.

Each person connects their own accounts from inside the seeCal apps, through Google's or Microsoft's own sign-in. ccal keeps the credential, encrypted under a key of that person's own, so their day stays current while their devices are asleep. Their devices hold only a seeCal session, never the calendar credential. Removing an account, or deleting your data, deletes the credential and gives up seeCal's access at Google or Microsoft.

Who can use it

seeCal is in testing with people invited from its waitlist. Each person sees only the calendars they connected themselves.

Proposals, not silent writes

Nothing writes to a calendar without its owner saying yes. A suggested event, such as a block for travel, is shown first, and only an approved one is created. Every proposal is recorded, so there is always an account of what was suggested and by what.