Google Calendar SMS setup guides

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.

For Etisia's workflow, client messages and pricing, see SMS reminders for Google Calendar.

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 12/month billed yearly with 100 SMS; 21 days free, no card; works inside Google Calendar; clients install nothing, and an optional link lets them cancel.

Next step

Set up your first client reminder

Follow the setup guide to connect your calendar, add a client's phone number and choose when the reminder is sent.

Open the SMS setup guide

No booking-system switch. No calendar migration. No new app for clients.

Start here

How to Add SMS Reminders to Google Calendar

Connect Etisia to Google Calendar, choose reminder timing, add or match the client phone number, and send automatic SMS reminders from the events already on your calendar.

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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.