calen is an AI calendar assistant you control by chatting in plain language. It schedules meetings, reschedules events, finds free time, and manages your calendar across the web, Telegram, and email. calen connects to your Google Calendar and works like a personal chief-of-staff for your time.

How does an AI calendar assistant work?

You tell calen what you want in natural language, for example, "Schedule lunch with Sarah tomorrow at 1 PM" or "Move my 3 PM to next week." calen reads your connected calendar, checks availability, resolves conflicts, makes the change, and confirms it back to you.

Does calen work with Google Calendar?

Yes. calen integrates directly with Google Calendar, so events you create or change sync in real time both ways. Outlook and iCal support are on the roadmap.

Can I use calen on Telegram and email?

Yes. calen is multi-channel: chat with it in the web app, message it on Telegram, or CC it on an email thread to coordinate a meeting. Every channel shares the same assistant and the same calendar access.

How is calen different from Google Calendar or a regular scheduling app?

A regular calendar shows your schedule; calen runs it. Instead of clicking through forms, you ask in plain language and calen books, moves, and finds time for you, proactively. It is an assistant, not just a grid.

Yes. calen has a free-forever plan with 50 AI requests per month, calendar management, and 10 email assistant credits. Pro raises that to 1,000 AI requests and 1,000 email credits per month, plus executive assistant features. No credit card is required to start.

Is my calendar data private?

calen only accesses the calendars you explicitly connect and uses that access solely to carry out your requests. You can disconnect your calendar at any time from settings.

Group Scheduling Without the Email Ping-Pong

Two-person scheduling is easy: one proposes, one accepts. Add a third person and the email count roughly triples, because every proposed time has to survive everyone's calendar. Group scheduling is a coordination problem, and coordination problems need a protocol, not more reply-alls.

Why group threads spiral

The failure mode is booking too early. Someone proposes Tuesday at 10, the first person confirms, the invite goes out, and then the third person replies that they are traveling Tuesday. Now the thread is rescheduling a meeting that never should have been booked, and everyone's calendar has a ghost event.

The protocol calen follows

Step 1: publish availability. The assistant shares the organizer's real open slots from Google Calendar, so every proposal is grounded in times that are actually free.
Step 2: ask everyone, wait for everyone. Each attendee is asked which of those times work. The assistant explicitly does not book until every required attendee has replied, even if the first response is enthusiastic.
Step 3: book the earliest common slot. Once all responses are in, the assistant picks the earliest time that works for the whole group and sends one invite to exactly the people on the thread.
Step 4: handle the no-overlap case. If no single option works for everyone, the assistant proposes a fresh round of open times instead of silently dropping an attendee.

What this looks like in practice

You CC your calen assistant on the thread and write one sentence: "calen will find a time for the three of us." The assistant posts your availability and asks the other two to pick. When one replies quickly, the assistant acknowledges it and says it will confirm once the other has weighed in. When the second reply lands, the invite goes out for the earliest slot both picked. Your total effort: one sentence.

The quiet benefit: no premature invites

Because the assistant treats "everyone has answered" as the gate for booking, calendars stay clean. Nobody gets an invite that later moves twice, and nobody has to be the person chasing the colleague who has not replied. The assistant does the chasing politely, on the thread, where everyone can see the state of play.

Group coordination ships with the email assistant on every calen plan, including free. Connect Google Calendar, CC your assistant, and let the protocol do the ping-pong for you.

Ready to try your new assistant?

calen schedules, reschedules, and coordinates meetings for you on the web, Telegram, and email. Free to start, no credit card required.