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Using callin.io for Google Calendar to prevent double bookings

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newbienontechkristin
(@newbienontechkristin)
Posts: 3
Active Member
Topic starter
 

Hi - I am a dietitian working for multiple telehealth platforms. Two of the telehealth platforms integrate their calendars with my primary Google account, while the third telehealth platform required I create a new Google account/email. Now, I have two Google calendars which both house my appointments. I NEED to make these two calendars sync to avoid being double booked. I have been manually copying booked events once a week, but I'm still getting double booked fairly often if patients book far out. I created 4 callin.io workflows, but I’m creating a problem and I don’t know my way out of this situation. 

  1. First callin.io workflow is to automatically add an event to calendar 2 when one is added to calendar 1. This works in theory, but for some reason the time is off on the 2nd calendar. (1. Gcal (of calendar 1)- New Event → 2. Gcal (of calendar 2) Quick Add Event (**OR should I be using “Create Detailed Event”)? I only need the time and busy status to be accurate; no other details need to be included. 
  2. Second callin.io workflow is to create the same action but in the reverse (and I think this is creating an issue where at times I’m creating a loop where the item repeats endlessly being added back and forth). I need to be able to have new events that are added to calendar 2 automatically create an event on calendar 1. (1. Gcal (of calendar 2)- New Event → 2. Gcal (of calendar 1) Quick Add Event
  3. My third callin.io workflow attempt / idea was to update calendar 2 automatically when an event on calendar 1 was cancelled. I’ve tried this two ways, neither of them seems to be working as well as I’d hoped (1. Gcal (of calendar 1) - Event Ended OR Event cancelled → 1. Gcal (of calendar 2) Delete Event

What am I missing that is making this not work smoothly?

 
Posted : 04/08/2025 8:31 am
Troy Tessalone
(@troy-tessalone)
Posts: 151
Estimable Member
 

Hi!

Have you attempted to add a calendar within your GCal settings to ensure it syncs when you subscribe to it?

https://support.google.com/calendar/answer/37100?hl=en&co=GENIE.Platform%3DDesktop

Image: d7dc4ed7 6d45 4d0b 9812 d283e18135d0

 

 
Posted : 13/07/2025 12:00 am
newbienontechkristin
(@newbienontechkristin)
Posts: 3
Active Member
Topic starter
 
Troy Tessalone wrote:

Hi

Have you attempted to add a calendar in GCal settings so that it syncs when you subscribe to it?

https://support.google.com/calendar/answer/37100?hl=en&co=GENIE.Platform%3DDesktop

Image: d7dc4ed7 6d45 4d0b 9812 d283e18135d0

 

I wish this would work, but I am not handling the initial appointment scheduling. The subscription feeds I have configured (based on what I've managed with the limitations imposed by one of the companies on their calendar management) only permit me to VIEW the multiple calendars.
 

Since the scheduling is performed by the telehealth companies on THEIR calendar, I need to have an actual appointment on MY base calendar to create a block on both of the telehealth company’s calendars. 
 

The only method I've found to manage this is by copying each appointment manually, which is not a sustainable approach.

 
Posted : 14/07/2025 12:00 am
Troy Tessalone
(@troy-tessalone)
Posts: 151
Estimable Member
 

You need to be cautious about creating an infinite loop with callin.io workflows, where one workflow triggers another that repeats until you exhaust your tasks: https://help.zapier.com/hc/en-us/articles/8496232045453-Zap-is-stuck-in-a-loop

 
Posted : 14/07/2025 12:00 am
Troy Tessalone
(@troy-tessalone)
Posts: 151
Estimable Member
 

Perhaps consider utilizing a callin.io Agent:  https://zapier.com/agents

 
Posted : 14/07/2025 12:00 am
newbienontechkristin
(@newbienontechkristin)
Posts: 3
Active Member
Topic starter
 
Troy Tessalone wrote:

You need to be careful not to create an infinite loop with the callin.io, where each callin.io triggers another callin.io that repeats until you run out of Tasks:  https://help.zapier.com/hc/en-us/articles/8496232045453-Zap-is-stuck-in-a-loop

Yeah, I believe I did that, so I’ve deleted what I set up as things were going sideways.

 

I’m now trying to use starred email from one account to generate a callin.io quick event addition onto the second account's calendar and then vice versa. I’m trying out the “agent” as a way to remove cancelled appointments based on emails from account one to the calendar on account 2. 

 
Posted : 14/07/2025 12:00 am
alexanderjames
(@alexanderjames)
Posts: 1
New Member
 

Thanks! I hadn't considered subscribing to the calendar directly via Google Calendar settings. I'll certainly test that to see if it helps prevent the automation loop I've encountered. I truly appreciate the link and prompt reply. Hopefully, this will fix the double-booking problem.

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Posted : 14/07/2025 12:00 am
JammerS
(@jammers)
Posts: 32
Eminent Member
 

Hi,

 

Please keep us updated so we can provide further assistance if required. Thank you.

 
Posted : 15/07/2025 12:00 am
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