Google Calendar SMS integration for appointment reminders
A Google Calendar SMS integration reads the appointments in your calendar and texts each client a reminder before the visit, something Google Calendar cannot do on its own. There are three ways to set one up: a Google Workspace Marketplace add-on, a do-it-yourself automation with an SMS gateway, or Etisia, which runs alongside your calendar with nothing for clients to install.
Google Calendar to SMS: the three ways to set it up
| Route | Who it suits | What it costs or requires |
|---|---|---|
| Google Workspace Marketplace add-on | Solo users who want a sidebar tool inside Google Calendar and can manage per-message credits. | Install from the Marketplace; SMS credits, calendar access, and support depend on the publisher. |
| Do-it-yourself: automation tool + SMS gateway | Teams with someone who can build and maintain an automation and keep a gateway account funded. | Two subscriptions (automation tool and SMS gateway), a phone number in every event, and upkeep whenever the calendar or gateway changes. |
| Etisia | Businesses that keep Google Calendar as the schedule and want client texts without switching to a booking system. | Starter USD 15/month with 100 SMS; 50 free SMS to try, no card; works inside Google Calendar; clients install nothing and cancel with one tap. |
Next step
Stop losing appointments to missed reminders
If the appointment is in Google Calendar and Etisia can resolve the client's phone number, the reminder workflow can run automatically.
No booking-system switch. No calendar migration. No new app for clients.
Most useful Google Calendar playbooks
Add SMS Reminders in 45 Seconds
See the fastest path: connect your calendar, pick a template, and send a test SMS without rebuilding your booking flow.
How to Add a Client Phone Number to a Google Calendar Appointment
Google Calendar has no phone-number field. Here is how to use event titles, saved contacts, imports, and smart matching.
Keep Google Calendar and Still Send SMS Reminders
For businesses that book by phone, text, DM, walk-in, or booking link but manage the final schedule in Google Calendar.
Can Google Calendar Send Text Reminders?
The direct answer, what Google Calendar reminders can and cannot do, and how to add client-facing SMS.
Google Calendar SMS Reminders Discontinued
What Google removed in 2019, which personal notification options remain, and why the retired feature still causes confusion.
Set Reminder Timing for Appointments
Choose reminder timing from immediate to days before the appointment, with quiet hours to avoid bad send times.
Supported Countries and SMS Rules
Check supported countries, sender types, opt-out handling, consent notes, and practical SMS delivery rules.