It syncs both ways. Put surgery or a hospital round in your calendar and those slots stop showing on your booking page. Confirmed appointments go the other way, onto your calendar, as soon as they are booked.

It is the first thing doctors ask, and it is fair. A booking page that does not know your real life is worse than a notebook. Here is the answer.
One click at setup. Pick the calendar that already holds your surgeries, rounds and travel. That is the one with the clashes in it.
Anything in that calendar takes those times off your booking page. You do not enter things twice. And a patient cannot take a slot you already gave away.
Every confirmed appointment shows on your Google Calendar. Online, walk-in, phone or WhatsApp. So the calendar you check between patients is complete.
Both plansSurgery, a hospital round, a wedding. If it's on the synced calendar, the slot never shows.
Working days, lunch, and leave you know about in advance. Set once, no calendar entry needed.
An online booking, or a walk-in your staff typed in. Either way the slot closes for everyone else immediately.
The sync is Google Calendar only. Outlook and Apple Calendar are not connected today. With those you would block the time inside FormAlert instead. It can also only work with what you write down. A delay nobody put in a calendar is still a delay. If you often run late, the waiting-room queue display does more for you than the calendar does.
Two-way Google Calendar sync, the booking page, and WhatsApp confirmations from FormAlert's number.
Adds 24-hour and 2-hour reminders, multiple doctors each with their own calendar, and messages from your clinic's own WhatsApp number.
₹999/month. 14 days free, no card. Or book the demo appointment and see the patient side first.
In short
FormAlert is an appointment booking system for private clinics in India. It handles online bookings, walk-ins, phone and WhatsApp appointments in one queue, sends WhatsApp confirmations and reminders, and requests a Google review after each visit. Two plans: Starter ₹999/month and Business ₹1,999/month.