Every calendar tells the same story
Connect as many calendars as you like, across as many accounts as you like. Book something in one and the others block the time out within seconds. No more holding two tabs open and hoping.
Calendar sync · booking links
Never double-booked.
Busy is all they see.
busywait keeps every calendar you own in step — Google, Outlook, iCloud — so a booking in one blocks the time in all of them within seconds. By default what crosses over is a start, an end and the word busy. Titles, guests and notes stay where you put them until you decide otherwise.
Free forever for two calendars · no card · about two minutes to set up
Thursday 12 MarchIn sync
09:0010:0011:0012:0013:0014:0015:0016:00
Work
Northwind
Outlook
Personal
iCloud
Works with
Google Calendar
Personal and Workspace
Outlook
Microsoft 365 and Outlook.com
iCloud
Apple Calendar
CalDAV
Fastmail, Proton, self-hosted
How it works
Three steps, and then silence
- 01
Connect them
Sign in to Google, Outlook, iCloud or any CalDAV server and tick the calendars you want involved. No admin approval, no browser extension, nothing to install. Two minutes, most of it spent deciding.
- 02
Say what travels
Mirror both ways, or push in one direction only. Busy-only is the default and stays the default. Where you want more — titles between two calendars that are both yours, or a client being able to tell a movable call from focus time — you switch it on for that one sync.
- 03
Stop thinking about it
Book anything in any calendar and the others block the time within seconds. Share one link and let people take a slot every calendar agrees is genuinely free. That is the whole product.
Busy by default
The title never leaves the room
Most sync tools treat privacy as a setting you can find if you go looking. Here it is the shape of the thing: by default a mirrored event has three fields, and none of them is the title. Adding to that is a decision you make per sync, never one we make for you.
- No title, no guest list, no location
- No description, no video link, no attachments
- Switch any of it on per sync, when a sync earns it
In the calendar it was made in
- title
- Q3 budget — redundancies
- start
- 2026-03-12T10:00:00Z
- end
- 2026-03-12T11:00:00Z
- location
- Meet · abc-defg-hij
- attendees
- you@work.com, cfo@work.com
- description
- Bring the headcount model…
What crosses by default
- start
- 2026-03-12T10:00:00Z
- end
- 2026-03-12T11:00:00Z
- status
- busy
Three fields, unless you have told this particular sync to carry more. Nothing on the left reaches the other calendars because you have not asked it to — not because it is queued up behind a setting we hope you never find.
Booking links
One link that knows about all of them
Send a link, let someone pick a time. Before a slot is offered it is checked against every calendar you have connected — including the ones you would rather not explain. They see the times that are free. They do not see what is in the way.
- Buffers, minimum notice and a daily cap
- Several links with different rules, if you need them
- Your own timezone handling, without the arithmetic
busywait.ai/adam/30min
Thirty minutes with Adam
Thursday 12 March · Europe/London
10:0013:00
Everything included
Small product, done properly
There is no enterprise tier hiding the good bits, and no roadmap of assistants waiting to be bolted on. This is the list.
Google, Outlook, iCloud, CalDAV
Personal Gmail and a Workspace account. Microsoft 365 and an old Outlook.com address. Apple Calendar. Fastmail or Proton over CalDAV. Mix them freely — busywait does not care whose calendar it is.
Rules that hold the line for you
Padding either side of a meeting. A minimum notice period so nobody books you in twenty minutes. A daily cap so Thursday does not become eight calls. Set once, applied everywhere.
A calendar per client, without the mess
Consultants, contractors and fractional operators end up in four org calendars they cannot merge. Mirror each one into your own and let every client see an honest picture of your availability, and nothing about each other.
Seconds, not a quarter of an hour
busywait listens for changes from each provider rather than sweeping every calendar on a timer, so a booking is reflected almost immediately. The one loop that spins here is ours, not yours.
No bot joins your meeting
There is no notetaker, no recorder, no transcript, no assistant reading your inbox, and nothing in your calendar is used to train a model. busywait is plumbing. It has no opinions about your meetings.
On principle
What busywait will never do
A list like this is only worth anything if it costs something to keep. These are features we have decided against, not ones we have not got round to.
- Put a notetaker or a recording bot in your meetings
- Train a model on your calendar, or anyone else’s
- Ask for access to your email
- Copy anything beyond the times unless you switched it on yourself
- Show one client anything at all about another
- Sell, share or broker your data — there is no second revenue line here
FAQ
Questions people actually ask
Answers written to be read on their own, so an answer engine quoting one of them gets it right.
- What is busywait?
- busywait is a calendar sync and booking-link tool. It connects the calendars you already have — Google, Outlook, iCloud or any CalDAV server — and keeps them in step, so booking something in one blocks the time out in all the others within seconds. By default a mirrored event carries only a start time, an end time and the status busy: no title, no guest list, no notes. It runs in any web browser.
- Which calendars does busywait sync?
- Google Calendar (personal Gmail and Workspace accounts), Outlook (Microsoft 365 and Outlook.com), Apple iCloud Calendar, and any CalDAV server including Fastmail, Proton and self-hosted setups. You can mix providers and accounts freely — busywait does not care whose calendar it is, and there is no limit on combining work and personal ones.
- Does busywait copy my event titles between calendars?
- Not unless you ask it to. By default the only thing that crosses between calendars is the time and the status busy — the title, guest list, location, description and video link all stay in the calendar the event was created in. You can switch titles, guests, notes or locations on for a specific sync if that particular pair of calendars warrants it, but it is always a decision you make, per sync, and never the default.
- What data does busywait store?
- Your email address, an encrypted access token per connected calendar, the names of your calendars, the start and end times of events in synced calendars, an opaque ID linking an event to its mirrors, and any bookings made through your links. It never receives recordings, transcripts, your email, your files, or anything from a calendar you did not connect. The full list, including what is off until you switch it on, is published at busywait.ai/what-we-store.
- How is busywait different from Calendly, OneCal or Reclaim?
- Most scheduling tools are adding AI assistants, meeting notetakers and recording bots. busywait deliberately does none of that — there is no notetaker, no transcript, no assistant reading your inbox, and nothing in your calendar is used to train a model. It does two things: keeps your calendars honest with each other, and gives you a booking link backed by all of them. The privacy default is the product rather than a setting buried in preferences.
- How quickly do calendars sync?
- Within seconds, in normal conditions. busywait listens for change notifications from each calendar provider rather than sweeping every calendar on a timer, so a booking is reflected in your other calendars almost immediately rather than at the next polling interval.
- Can I use busywait with several clients or work accounts?
- Yes, and that is the case it was built for. Consultants, contractors and fractional operators often end up in several organisation calendars that cannot be merged. Mirror each one into your own and every client sees an honest picture of when you are free, while learning nothing at all about the others — each sync is a separate connection with its own direction and its own settings.
- Does busywait record or transcribe my meetings?
- No. There is no notetaker, no recording bot that joins your calls, no transcript and no AI summary — there is nothing in the product capable of doing it. busywait never asks for access to your email either. It is plumbing between calendars and has no opinions about what happens in your meetings.
- Is busywait free?
- There is a free plan that syncs two calendars with one sync, busy-only, with 60 days of lookahead, and it is free indefinitely rather than a trial. Paid plans add unlimited calendars and syncs, booking links, buffers and notice periods, optional per-sync sharing of titles or guests, and a longer sync window.
- How do booking links work?
- You share one link and the person picks a time. Before a slot is offered it is checked against every calendar you have connected, so the times on offer are ones you can actually keep. Whoever is booking sees the free slots and nothing about what is in the way — no titles, no counts, no shape to the rest of your week. Booking links are part of the paid plans.
busy-wait /ˈbɪzi weɪt/ n.
A loop that checks, and checks, and checks again, until something finally changes.
Free for two calendars, forever
Connect two calendars and see if it goes quiet
No card, no trial clock, no call with anybody. If it does not fix the problem in ten minutes, it was never going to.