How to Integrate SMS and Email Reminders into Google Calendar

Connect Google Calendar to Remindlo and automate SMS and email reminders for every appointment. This guide shows you exactly how to set up the integration, customize messages, and start reducing no-shows today.

Whether you run a dental practice, MOT testing station, or beauty salon, this step-by-step tutorial will help you send automatic text and email reminders to clients without any manual work.

Why SMS Reminders Beat Standard Email Notifications

Before diving into the setup, let's address a common question: why bother with SMS when Google Calendar already sends email reminders?

The numbers tell the story:

• SMS open rate: 98% - almost every text gets read

• Email open rate: 20-30% - most appointment emails go unnoticed

• SMS response time: 90 seconds - people check texts immediately

• Email response time: 90 minutes - if they respond at all

For appointment-based businesses, this difference translates directly into revenue. A client who misses a generic Google notification might forget their appointment entirely. A branded text message from your business cuts through the noise.

That said, email reminders still have their place - especially as a second touchpoint alongside SMS. That's why Remindlo supports both channels. You can send SMS for the primary reminder and add email as a backup, or use both together for maximum reach.

Since switching to SMS reminders, our no-show rate dropped from 15% to under 5%. That's thousands of pounds saved every month."

Sarah, Dental Practice Manager, Manchester

Does Google Calendar Have Built-in SMS Reminders?

No. Google Calendar offers three types of native notifications:

1. Email reminders - sent to attendees' Gmail

2. Push notifications - requires the Google Calendar app installed

3. Browser pop-ups - only works if the calendar is open

None of these send actual SMS text messages to phone numbers, and the built-in email notifications are generic - they don't carry your brand, your message, or your booking link. To send personalised SMS and branded email reminders to your clients, you need a tool like Remindlo.

Prerequisites

Before starting the integration, make sure you have:

• A Remindlo account (create one for free)

• A Google Workspace or personal Google Calendar you own

• Phone numbers stored in calendar event descriptions - and/or clients added as event guests (for email reminders)

The setup takes about 5 minutes.

Method 1: Connect Google Calendar to the Remindlo Dashboard

This is the recommended approach for most businesses. Once connected, Remindlo monitors your calendar and sends SMS and email reminders automatically.

Step 1: Connect Google Calendar

1. Open the Remindlo dashboard and go to Integrations

2. Select Google Calendar and click Connect

3. Log in with Google and allow Remindlo to read your calendars (select all permissions)

That's it for the connection. Remindlo now syncs with your calendar.

Step 2: How Remindlo Handles Your Events

Remindlo works on autopilot with intelligent event processing:

• Phone number found in event: SMS reminders are scheduled automatically based on your campaign settings

• Guest email found: If you've added a client as an event guest, Remindlo picks up their email address automatically. If your campaign has the email channel enabled, branded email reminders are sent alongside SMS

• No phone or email: The event appears in your Calendar Leads section for manual review

This means you don't need to change how you create appointments. Just keep adding events to Google Calendar as usual - add a phone number in the description for SMS, invite the client as a guest for email, or do both.

-> Connect your Google Calendar now

Step 3: Customize Your Reminder Messages

Navigate to Campaigns in your Remindlo dashboard to customize reminder messages. You can use dynamic variables to personalize each text and email:

Example SMS message:

Hi {{first_name}}, reminder: your appointment at {{business_name}} is tomorrow. To reschedule call us on {{business_phone}}.

Keep SMS messages under 160 characters when possible to avoid splitting into multiple segments. Email reminders use the same template but are wrapped in a branded HTML layout with your business name.

Step 4: Choose Your Reminder Channels

In your campaign settings, you can select which channels to use:

• SMS only (default) - text message reminders

• SMS + Email - both channels for maximum reach

• Email only - for clients who prefer email

When both channels are enabled, Remindlo sends each reminder through every available channel. If a contact has both a phone number and email, they get both. If they only have one, they get that one.

Step 5: Set Your Reminder Schedule

Most successful businesses send two reminders:

1. 2 days before - gives clients time to reschedule if needed

2. 24 hours before - final confirmation when it's top of mind

You can configure this timing in your campaign settings. Some industries benefit from a third reminder 7 days before for appointments booked far in advance.

Step 6: Send a Test Reminder

Before going live:

1. Create a test event in Google Calendar with your own phone number in the description

2. Add yourself as a guest to test email reminders

3. Wait for Remindlo to sync (usually within minutes)

4. Confirm the SMS and/or email reminders arrive at the expected time

Method 2: Google Calendar Sidebar Add-on

Prefer working directly inside Google Calendar? The Remindlo sidebar add-on lets you manage reminders without leaving your calendar.

Install the Add-on

1. Open Google Calendar in your browser

2. Click the sidebar on the right and look for Remindlo

3. If you don't see it, install from Google Workspace Marketplace

Link Your Remindlo Account

1. In the add-on sidebar, click Link Your Remindlo Account

2. Click Get API Key from Remindlo - this opens your dashboard

3. Copy your API key (starts with sk_live_)

4. Paste the key in the add-on and choose whether to enable auto-assign

5. Click Save & Continue and select your default campaign

Configure Add-on Settings

• Auto-assign: When enabled, new contacts are presented automatically with the default campaign

• Default Country Prefix: Set to +44 for UK numbers or +1 for US. This converts local formats (07xxx) to the international format

• Account actions: Test connection, open dashboard, or reset if needed

Using the Add-on with Events

When you open any calendar event, the Remindlo sidebar shows:

• Sync status - whether reminders are scheduled

• Phone detection - found or missing

• Email detection - automatically picked up from event guests

• Manual controls - sync now, resolve missing data, change campaign

If a phone number is missing, you can enter it manually or provide an email address instead. The add-on pre-fills the email field from event guests automatically.

How Email Reminders Work with Google Calendar

When you add a client as a guest to a Google Calendar event, Remindlo automatically picks up their email address. Here's what happens:

1. Guest detection: Remindlo reads the event attendees and filters out your own email, conference rooms, and declined guests

2. Contact creation: The guest's email is saved to their contact record in Remindlo - alongside their phone number if available

3. Branded emails: Unlike Google's generic notifications, Remindlo sends professionally branded reminder emails with your business name, your message, and a direct reply-to your business email

4. Reply handling: When a client replies to a Remindlo email reminder, the reply goes directly to your business email - not to a no-reply address

This means you get the best of both worlds: the convenience of Google Calendar's guest list combined with personalised, branded reminder emails that actually drive responses.

Which Businesses Benefit Most?

Google Calendar SMS and email integration works especially well for:

• MOT Testing Stations - annual MOT reminders bring customers back automatically

• Tire Shops - seasonal reminders for winter/summer tyre changes

• Dental Practices - 6-month checkup reminders reduce patient churn

• Car Garages - service interval reminders for oil changes, inspections

• Beauty Salons - rebooking reminders for regular treatments

• Veterinary Clinics - vaccination and checkup reminders

Any business with recurring appointments and client phone numbers or email addresses can benefit.

-> Calculate how much you could save

Remindlo vs Other Google Calendar Reminder Tools

Several tools offer Google Calendar SMS integration. Here's what makes Remindlo a better choice:

Best Practices for Higher Response Rates

After helping hundreds of businesses set up SMS reminders, we've identified what works:

Message timing:

• Send the first reminder 3 days before

• Send a final reminder 24 hours before

• For appointments booked weeks ahead, add a 7-day reminder

Message content:

• Keep SMS under 160 characters

• Always include your business name

• Provide a way to reschedule (phone number or reply option)

• Use the client's first name

Channel strategy:

• Use SMS as your primary channel - it has the highest open rate

• Add email as a backup for clients who may miss texts

• If you only have an email address (no phone), email reminders are still far better than nothing

What to avoid:

• All caps (looks like spam)

• Multiple exclamation marks

• Vague messages without appointment details

• Sending more than 3 reminders per appointment

Troubleshooting Common Issues

No reminders being sent

1. Check that your Google Calendar is connected in Integrations

2. Verify events have phone numbers in the description or clients added as guests

3. Confirm your campaign is active and has the right channels enabled

Reminders arriving at wrong times

1. Check timezone settings in both Remindlo and Google Calendar

2. Verify they match your actual business timezone

3. Test with a new event to confirm the fix

Duplicate reminders

This usually happens when:

• The same event exists in multiple synced calendars

Solution: don't need to duplicate events across the calendars

Phone numbers not detected

Remindlo looks for phone numbers in specific formats. For best results:

• Use international format: +44 7700 900000

• Or label clearly: "Phone: 07700 900000"

• Set your default country prefix in settings to handle local formats

Email not being picked up

If email reminders aren't being sent:

• Make sure the client is added as a guest on the event (not just mentioned in the description)

• Check that your campaign has the email channel enabled

• Verify the guest hasn't declined the event - declined attendees are skipped

Frequently Asked Questions

How much does it cost to send SMS reminders from Google Calendar?

Remindlo offers a free tier with 10 SMS per month - enough to test the system. Paid plans start at GBP 19/month for 75 SMS. See full pricing.

Are email reminders included in the free plan?

Yes. Email reminders are available on all plans, including the free tier. There is no separate charge for email - you only pay for SMS.

Won't email reminders duplicate Google Calendar notifications?

They serve different purposes. Google's built-in notifications are generic one-liners ("Event in 30 minutes"). Remindlo emails are branded, personalised messages from your business with your contact details and booking link. They also follow your campaign schedule (e.g. 2 days before, 24 hours before) rather than the fixed Google timing.

What happens when a client replies to an email reminder?

Replies go directly to your business email address (set in your Remindlo account settings). This means you can respond to clients normally from your inbox - no special setup needed.

Can I send SMS reminders to multiple clients at once?

Yes. If an event has multiple attendees with phone numbers, each receives their own personalized reminder.

Do clients need to install any app?

No. Reminders arrive as standard SMS text messages and regular emails. Clients don't need to download anything or create accounts.

Is this GDPR compliant?

Yes. Remindlo is built for businesses with GDPR compliance in mind. You're responsible for having appropriate consent to contact clients, which is typically covered by your existing appointment booking process.

How quickly do new appointments sync?

The dashboard integration syncs in near real-time - usually within a few minutes. The sidebar add-on can trigger immediate manual syncs.

Get Started in 5 Minutes

Ready to reduce no-shows and save hours of manual reminder calls?

1. Create your free Remindlo account

2. Connect Google Calendar in Integrations

3. Customize your reminder message and choose your channels

4. Let Remindlo handle the rest

No credit card required. Your first 10 SMS are free. Email reminders are unlimited.

-> Start sending reminders today

-> See more about Google Calendar Integration