How can we help?

On the home page, type a name into the claim box. Available handles end up as atcal.co/@yourname. Three or more characters; letters, numbers, and underscores only.

Apple Calendar, Google Calendar, and Microsoft 365 today. We pull only busy/free intervals — never event titles or attendees. Outlook on the desktop syncs through the same Microsoft 365 connection.

No. They get a notification by email or push with three pre-filled times. They tap one, and it lands on both your calendars. The signup is hidden inside the action — they can create an @cal handle from the same flow if they want one.

No. Titles, locations, notes, and attendees stay on your phone, encrypted at rest. The only thing two people can ever see together is the intersection of busy/free time. The full story is on the privacy page.

They see what they’d see for any user who hasn’t accepted them as a mutual: a generic “not available” response. They can’t tell whether you’re busy, away, or have blocked them.

Yes — your handle is public, like a Twitter username. Strangers can request to plan with you once per week. Your free time only gets revealed once you accept.

Anywhere your friends already look — Twitter/X bio, Instagram, LinkedIn, your email signature, the back of a business card. Each place it lives is one less back-and-forth thread later.

Not yet. Today each person gets one handle. We’re thinking about “office hours” sub-handles for work vs. personal contexts.

When you create a group event you can set a threshold — “happens if 3+ can come.” @cal auto-confirms the moment that many people say yes. No one has to be the decider.

A spontaneous broadcast. Tap Free now, set a duration (1–4h) and an audience (close friends or all mutuals). They see your status. The first one to tap “I’m down” locks it in.

Open the event and tap Reschedule. @cal sends a fresh three-time invite to your guests; the first to confirm replaces the original on both calendars.

Settings → Account → Delete account. We remove all server-side data within 30 days. Confirmed events stay on your guests’ calendars but lose their @cal connection.

Yes — Settings → Account → Export. We email a JSON archive of your handle, mutuals, events, and free-now history within 24 hours.

Yes, while we’re in the launch window. If we ever add paid plans, current free features stay free. We’ll give at least 30 days’ notice before charging for anything.