Square Appointments is a well-known booking platform. But if Google Calendar is where you actually run your schedule — and you mostly want reliable text reminders rather than a full booking-and-payments system — it’s worth comparing a lighter, Google-Calendar-native option. This guide looks at SMS Reminder as a Square Appointments alternative, using Square’s own published description of its reminders.
Quick answer
SMS Reminder is a focused Square Appointments alternative for businesses built around Google Calendar. Square Appointments sends automated SMS and email reminders for bookings made in Square Appointments, and syncs with Google Calendar so personal events block availability.1 SMS Reminder works the other way around: it reads the events you already create in Google Calendar and sends automatic SMS reminders — with two-way texting so clients can reply to confirm, cancel, or ask to reschedule. If you don’t need Square’s booking, payments, and point-of-sale stack, the lighter option is often the better fit.
Why look for a Square Appointments alternative
Square Appointments is part of a broader platform that brings booking, communications, and checkout together.1 That’s powerful if you want an all-in-one system with payments — but it’s more than many businesses need if the goal is simply “text my clients before their appointment.” If you already keep your schedule in Google Calendar and don’t want to move bookings and payments into another system, a dedicated reminder tool can be simpler and cheaper.
How each approaches reminders
Square describes its reminders as automated SMS and email messages for bookings made with Square Appointments, with built-in Google Calendar sync so reminders follow real-time availability.1 In other words, reminders are tied to appointments booked inside Square.
SMS Reminder works from your existing calendar. It connects to your Google Calendar and triggers reminders from the events you create there — so you keep booking and managing appointments in the calendar you already use, with no migration and no separate booking system to maintain. Paid plans start at $19/month.
Two-way texting
SMS Reminder supports two-way texting: clients can reply to a reminder in plain language to confirm, cancel, or ask to reschedule, and the app responds automatically (in English, French, Spanish, Italian, Portuguese, and German) — or they can tap a confirm/cancel link. Because replying takes one tap, more clients respond, which is what reduces no-shows.
Which should you choose?
- Choose SMS Reminder if Google Calendar is your primary scheduling tool and you want automatic SMS reminders your clients can reply to, without adopting a full booking-and-payments platform. Start your free trial
- Choose Square Appointments if you want an all-in-one system that combines online booking, reminders, and integrated payments in a single platform.1
For the wider landscape, see our comparison of the best Google Calendar text reminder apps.
Sources
Competitor details can change — the item below was verified on Square’s own site on the access date shown. Confirm current information on Square’s site before deciding.
- Square — Appointment reminders, https://squareup.com/us/en/appointments/features/reminders, accessed 2026-08-12.
Frequently asked questions
What is a good Square Appointments alternative for Google Calendar?
If you already run your schedule in Google Calendar and mainly want automatic SMS reminders, SMS Reminder is a focused alternative. It sends reminders from the Google Calendar events you already create, with two-way texting so clients can reply to confirm, cancel, or ask to reschedule.
Do I need Square’s full platform just to send appointment reminders?
Not necessarily. Square Appointments bundles booking, reminders, and payments into one platform. If you only want SMS reminders for your existing Google Calendar, a dedicated reminder tool like SMS Reminder can be simpler.
Does SMS Reminder work with Google Calendar?
Yes. It connects to your Google Calendar and triggers reminders from the events you create there — there’s no separate booking system to move your appointments into first.
How much does SMS Reminder cost?
Paid plans start at $19/month, with a free trial. See the pricing page for current plans and limits.
This page references another company’s product. Details about Square Appointments can change; please verify current features and pricing on Square’s own site.
