Scheduling & Communication
SimpleGoogle Calendar + Twilio, appointment reminders that actually reduce no-shows
Automated SMS reminder cascades (48h, 2h before) tied directly to your calendar, plus instant waitlist-fill when a slot cancels.
Two tools, one clear trigger, one clear action. Tools: Google Calendar + Twilio.
2
automatic reminders per appointment (48h + 2h)
Instant
waitlist fill on cancellation
0
manual reminder calls
The problem this automation solves
No-shows cost service businesses real revenue, industry data consistently shows automated SMS reminders cut no-show rates by 30%+, but most businesses still rely on manual phone calls or no reminder system at all.
How the workflow runs
Trigger
A Google Calendar event is created, updated, or cancelled.
Schedule
Reminder SMS messages are queued at 48h and 2h before the appointment.
Confirm
Clients can confirm or cancel by replying to the SMS, updating the calendar event automatically.
Waitlist fill
A cancellation triggers an instant offer to the next person on the waitlist.
What you need before we start
- ✓The Google Calendar (or calendars) your bookings live in, with a consistent way to store the client's phone number in the event.
- ✓A Twilio account with an SMS-capable number registered for your country (in the US, A2P 10DLC registration for business texting).
- ✓Clients' consent to receive appointment texts, collected when they book.
What usually goes wrong with Google Calendar + Twilio, and how the workflow handles it
Rescheduled events
When an appointment moves, already-queued reminders for the old time are cancelled and new ones are scheduled, so nobody gets a reminder for a slot that no longer exists.
Time zones
Reminders use the time zone of the calendar event, not the server, so clients in other time zones get the right time in the message.
Opt-outs
Replies like STOP are honoured automatically and the number is excluded from future reminders.
Missing phone numbers
Events without a valid number are listed for your team instead of failing silently.
Want Google Calendar + Twilio connected like this?
We map your exact setup on a free 45-minute audit and tell you precisely what this would look like for your business, no commitment.
Get my free automation plan →Frequently asked questions
Does this work with booking platforms other than raw Google Calendar?
Yes, we integrate the same pattern with Calendly, Acuity, Cliniko, and most scheduling tools that sync to Google Calendar.
Can clients reschedule via SMS?
Yes, reply-based rescheduling is available, it routes back into your calendar and re-triggers the reminder sequence for the new time.
Can reminders go by WhatsApp or email instead?
Yes. The same schedule can send email, SMS or WhatsApp (through the WhatsApp Business API), depending on what each client prefers.
What does it cost to run?
Twilio bills each SMS at its published per-message rate, which depends on the country. The workflow itself is part of your PURIST plan.
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