Google Calendar Reminders That Actually Reach Attendees

Missed Appointments Cost You Revenue Manual Follow-ups Waste Hours SMS Bills Add Up Fast Emails Go Unread

Calendar Reminders is a Google Calendar add-on that sends automated reminders via Email, SMS, WhatsApp, or Telegram — directly from the event panel. Zero manual work.

Works Inside Google Calendar
Email · SMS · WhatsApp · Telegram
Automated — Zero Manual Work
Install on Google Calendar View Tutorial
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Built for the Way the World Communicates

One add-on. Every channel your attendees actually use.

4

Reminder Channels

98%

WhatsApp Open Rate

0

Extra Apps for Attendees

1-click

Google Workspace Install

Up and Running in Minutes

No external dashboard. No CSV imports. No technical setup.

1

Install from Google Workspace Marketplace

One-click install. Calendar Reminders appears directly in your Google Calendar sidebar — no external dashboard required.

Google Workspace Marketplace No coding required
2

Open an Event and Add Contact Info

Open any event in Google Calendar. Enter attendee phone numbers or emails and select their preferred reminder channel.

SMS WhatsApp Telegram Email
3

Set Timing — Delivery is Automatic

Choose when reminders fire (e.g. 24h before, 1h before). The add-on handles delivery on every configured channel automatically.

Custom timing Multi-channel Delivery status

Reach Attendees on Any Channel

Other add-ons send SMS and call it done. Calendar Reminders covers every channel your attendees actually use.

Universal

Email

Zero cost. Works for every attendee. Sent automatically with event details included.

Always Works

SMS

No app required. Works on every phone. The most reliable fallback for any attendee.

Most Popular

WhatsApp

Free messaging, 98% open rate. The default messenger across Latin America, Europe, India, and MENA.

Free

Telegram

Fast and free. Widely used in Eastern Europe, CIS countries, and tech communities.

Common Questions

Everything you need to know about Calendar Reminders.

Install Calendar Reminders from the Google Workspace Marketplace. It appears directly in your Google Calendar sidebar. See the tutorial for a step-by-step walkthrough.
Email, SMS, WhatsApp, and Telegram. You can configure a different channel per attendee on the same event.
No. Attendees just receive the message on their phone or email — no app install, no account, no action required on their end.
Enter the attendee's phone number in international format (e.g. +33612345678) in the contact info field shown by the add-on in the event sidebar.
Delivery status is shown in your dashboard. If a message fails, you will be notified. Contact support with the event details and we will investigate.
Yes. Phone numbers are stored encrypted and never shared with third parties. We are GDPR compliant. See our Privacy Policy for details.
See our pricing page for current plans and details.

Still have questions?

Contact our support team and we will get back to you within 24–48 hours.

Start Sending Reminders Today

Install Calendar Reminders from Google Workspace Marketplace and stop losing attendees to missed appointments.

Install on Google Calendar View Tutorial