SyncStay is live — and the half of the problem we can actually promise
Keeping calendars in step is only half of it. The half that saves you is being told when two guests claim the same night — and that's the half that doesn't depend on anyone else's schedule.
SyncStay is live. One calendar for Airbnb, Booking.com and the bookings that arrive by WhatsApp — and an alert when two of them want the same night.
A SyncStay illustration, not a depiction of any platform's interface.
That last part is the bit worth talking about, because most tools treat it as a footnote.
Two halves, and they are not equally reliable
Calendar sync is really two jobs.
The first is propagation — a booking lands on Airbnb, and Booking.com needs to stop selling those nights. The second is detection — two bookings already overlap, and you need to know before someone is standing at your door with a suitcase.
Everyone sells the first one. Almost nobody is straight with you about it: propagation is only half in anyone's control. We publish your updated calendar immediately, but when Booking.com next reads it is Booking.com's decision. Anyone quoting you a number there is promising something they do not own.
Detection is different. It depends on one thing: how often we look.
Why that changes what is worth paying for
We re-check every connected calendar every 15 minutes.
We also went and measured what the platforms actually serve. Airbnb and Booking.com hand over their calendar feeds with no caching in front of them, so there is no hidden delay sitting between their side and ours. Our polling interval is the whole of the wait.
Which means a genuine overlap reaches you within minutes — by email and in the app, with both bookings named and the nights that clash spelled out. Not at check-in. Not from the guest.
So here is the honest pitch: even if you never care about the propagation half, the detection half earns its keep on its own. A double booking costs you a refund, a scramble to rehouse somebody, and a review that sits on your listing for a year. Being told the same morning is the difference between an awkward message and a ruined weekend.
The bookings nothing else knows about
There is a reason overlaps happen even to careful hosts.
Airbnb and Booking.com can share calendars with each other directly, for free, and if that is your whole setup you should absolutely use it. But a booking that arrives by WhatsApp, a phone call, or a friend of a friend exists nowhere except in your head until you write it down. Neither platform can block nights it has never heard about.
Add it to SyncStay once and it blocks those nights everywhere you have connected. That is the gap the free setup cannot close, because there is nothing for it to read.
What it costs
€4.99/month for two properties, €9.99 for five, €14.99 for ten. 30 days free, card required to start, nothing charged until day 31, cancel whenever you like.
Connecting a calendar takes a couple of minutes per platform, and it works in both directions: you paste each platform's link into SyncStay, and SyncStay's link into each platform. Do both halves. Skipping the second is the most common way a setup ends up quietly one-way — everything looks healthy, and nothing you book elsewhere ever reaches that platform.
If you have ever had the double-booking phone call, we would like to hear how you handle it now. That is more useful to us than a signup.