Google Workspace Marketplace
Automatic SMS appointment reminders and a free online booking page for Google Calendar™. Clients text back to confirm or cancel. Now Kalama.
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Listing updated:October 22, 2026
Works with:
808K+
Overview
SMS Reminder for Google Calendar™, now Kalama, sends automatic SMS appointment reminders from the Google Calendar™ you already use, lets clients confirm or cancel by replying to the text, and gives you a free online booking page with your own logo and brand colour. Google Calendar™ stays your source of truth, so there's no new calendar to manage. Built for salons, trainers, tutors, mobile services and small teams who run on appointments.

Free to start, no credit card
- A free online booking page on your primary Google Calendar™, forever
- Your logo and brand colour on the page, free on every plan
- Unlimited appointment types
- 25 SMS reminders to try (one time, they don't expire)
- Paid plans from $19/month USD add monthly reminders, more calendars and more users. No features held back on any plan.

Why businesses choose SMS Reminder
- Less setup for every appointment. Bookings from your booking page get reminders automatically. For appointments you add yourself, open the event, add the client's number from the sidebar and save. In the web app, approve a suggested number once and future appointments with it, including recurring ones, switch on by themselves.
- Clients just text back. "Yes" or 👍 confirms. "Can't make it" cancels and frees the slot. Asking to move? They get your booking link. Works in English, French, Spanish, Italian, Portuguese and German.
- Your calendar updates itself. Events turn green (confirmed), yellow (pending) or red (cancelled), with the status in the title. Cancelled appointments stop getting reminders.
- A booking page that looks like your business. Your logo and colour on every booking page and on the booking button for your website. Clients book, reschedule or cancel themselves. Add booking questions, buffers and notice periods, and a location or Google Meet™ link for each service.
- A cancellation policy that works for you. Set a notice window, warn or block late cancels, and see every late cancel in one list so you can follow up or charge your fee.
- Every message, your way. Unlimited templates for confirmations, reminders and follow-ups, filled in with the appointment's date, time, location and video call link (Google Meet™, Zoom, Microsoft Teams or Webex).
- Lives in Google Calendar™. Open it from the right-hand sidebar. Nothing new to learn.

By the numbers
- 814K+ installs on the Google Workspace™ Marketplace
- 2,000+ businesses send reminders with SMS Reminder
- 5M+ reminders sent
- Works in 100+ countries

Get started in 4 steps
1. Click Install.
2. Open the app from the right-hand sidebar of Google Calendar™.
3. Set your reminder timing once, for example 24 hours and 2 hours before.
4. Share your free booking link. Bookings get reminders automatically, and clients reply to confirm or cancel.

SMS Reminder is becoming Kalama
Same product, team and account. Nothing to reinstall. You'll see "Kalama, formerly SMS Reminder" while the name changes.

Pricing
Free plan: online booking page forever plus 25 reminders one time, no credit card. Paid plans $19–$125/month USD, 2 months free on yearly billing, 30-day money-back guarantee, cancel anytime.

Privacy
SMS Reminder only accesses the calendar data needed to schedule and send your reminders. See our privacy policy and terms of service below.

Google Calendar™, the Google Calendar™ logo, Google Meet™ and Google Workspace™ are trademarks of Google LLC.
Additional information
PricingFree of charge trial
Developer
Support
Privacy policy
Terms of service
SMS Reminder for Google Calendar™ by Kalama will ask for the permissions shown below. Learn more
SMS Reminder for Google Calendar™ by Kalama will need access to your Google account
This will allow SMS Reminder for Google Calendar™ by Kalama to :
See the events you open in Google Calendar
Run as a Calendar add-on
View and edit events on all your calendars
See and download any calendar you can access using your Google Calendar
Connect to an external service
View your country, language, and timezone
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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Avery McCarley
August 12, 2026
I did not have high expectations, but this is perfect for what I need! It is simple and easy to use. I will definitely be signing up for the paid version.
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Krismary peña krismary peña (krismary peña)
March 2, 2026
😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍
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Don Perrin
September 4, 2026
Does not work.
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James Handelin
August 1, 2025
As a small business owner and software developer, I am insanely busy with coding, meetings, clients, and work in general. I've completed my own testing of this app and it does exactly what it says it does. I am so impressed that I will be subscribing to the paid version. What I like? 1. Intuitive user interface 2. Installation and on-boarding is simple 3. Connectivity with Google Calendars is simple to setup 4. The app hasn't dropped the ball ever! If it is in my calendar(s), and I've configured the app to send an SMS based on certain criteria I get an SMS reminder. 5. No more manual texting to clients reminding them of appointments. This app automates the entire flow. A-W-E-S-O-M-E!!! Why I chose this app over other solutions. It solves a problem/pain point" 1. How do I as a small business owner remind clients of our appointments without a) "bugging them with email reminders they may never see," b) how do I choose a solution that our team will adopt and use? c) I don't need to add yet another task to my "apps to code" project list instead... d) use SMS Reminders. Easy. Keep up the great work and to those that are reading this...download this app and check it out!
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Tuphonez Fofree
August 19, 2025
This is a great add on to google calendar! Never knew I needed this add on as much. But since Im on a Free Cellular Phone Service from TextNow Wireless. They require you to make at least one call or send one text message to keep your free service active. The phone service is free for life. Well as long they stay in business and users are using the free plan. I can just use this to send out a sms reminder weekly! Fo Free! But itll also be useful to me for my work and school and maybe whatever else plans or appointments or meetups I have as well. It was easy to setup and works fine out the gate. Salutes to the developers for this app or software add on. Thanks!
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A User of SMS Reminder for Google Calendar™ by Kalama
March 26, 2026
Robin Hood Digital Secure Special Edit for Social Interaction and New Ticktock regular Data Explore with Google Expensive Network data
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Dallas Bratcher
August 7, 2025
I have been looking for something easy to send message to phone. I just installed this and setup a test. It is so easy to use and I love it. It only took me a few minutes setup and I love that it interfaces with my google calendar. Good job as always.
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Deanna Sanford
August 1, 2025
I just tested this app out to see how it works. The reason for this review is because, I was highly satisfied with the app. I give it 5 stars because of the way it was described was exactly the way it worked. It was easy to set-up just follow the prompts. I recommend this app if you have appointments and your job involves you making them appointments. I am a case manager for a rehab. I am responsible for making sure my client's make those appointments on time and as scheduled. I am going to recommend this to my co-workers. Maybe we will start using this app to incorporate our daily schedules.
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De'rese Gooden
April 12, 2025
Abstract: The app is stellar and provides a quick solution to Admin challenges previously experienced in past for agencies, small businesses and organizations that where still behind the times so to speak and made outbound calls to leave voice messages on cellphones and answering machines which less than 50% of the Metaverse and GenZ utilize today which is most ineffective in providing quick, solution, "targeted follow ups" for appointments. Now with an automated SMS Txt reminder sent to the phones, it is seamless and clients are more prone to remembering appointments sent within 3 hours, 1 hour, 30 minutes on the device that receives over 80% of their direct focus anyway. management, particularly for individuals with ADD or those managing multiple appointments. Overall, the app is highly recommended as a dependable tool for personal and professional scheduling. Key Points: - The SMS Reminder app integrates smoothly with Google Calendar, providing automatic SMS notifications for events. - Users find the setup process quick and user-friendly, making it accessible to non-tech-savvy individuals. - The app effectively reduces missed appointments, enhancing overall scheduling organization. - Many reviewers highlight the app's value for people with attention challenges, helping them stay on track with important tasks. - Real estate professionals appreciate the app for its ability to remind clients of appointments without the hassle of manual texting. - The intuitive interface of the app has been praised, making it easy to navigate and use. - Some users notice that SMS reminders are more attention-catching than regular app notifications, making them a preferred choice for timely alerts.
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Krystn Hockey
September 14, 2025
SMS Reminder works extremely well! The setup was easy and uncomplicated, plus the syncing of the data from my calendar into an SMS was accurate.
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