Text message reminders

Why reminder quotas differ

The apps above do not share a common billing unit. Your practice running 300 appointments per month with two automated SMS reminders per appointment generates 600 messages. Apptoto charges $39 per month for 450 automated message credits as of October 23, 2026 (pricing). Your 600 automated messages cost exactly $57 if each SMS is within 300 characters and Allow Overages is enabled. That $57 figure is an illustrative base plan plus overage subtotal, not an all-in quote. The arithmetic is 450 included credits plus 150 overage credits at $0.12 each, $39 plus $18. That arithmetic excludes automated emails, voice calls, auto-replies, compliance messages, and add-ons. If Allow Overages is disabled, automated messages stop at the 450-credit limit.

Text Request bills differently. Its Basic plan costs $59.99 per month for 1,000 texts as of October 23, 2026 (pricing), and every text sent and received counts toward your limit except conversations with Text Request support (usage). If each outbound reminder and each reply is one unit, 600 outbound reminders plus 100 replies equals 700 texts. Longer replies count as multiple texts, so your total can run higher.

AppointmentReminder counts each outgoing SMS or voice call as one reminder, with emails and incoming replies free (pricing). GReminders counts 160 characters as one SMS credit, dividing longer messages into segments of 153 characters (pricing). Square does not publish a flat SMS allowance on its reminders page checked October 23, 2026 (reminders). You cannot compare these quotas line for line without converting your own monthly volume into each provider's unit.

Choosing by workflow type

Your workflow determines which app fits. A calendar add-on that syncs with Google or Outlook suits you if you already schedule appointments elsewhere and only need reminders sent automatically. GReminders and AppointmentReminder both sync with Google Calendar and Outlook (GReminders pricing, AppointmentReminder pricing). A booking and reminder platform fits businesses that want clients to self-schedule online, and Appointible, Square Appointments, and AppointmentReminder each include booking and reminder tools (Appointible pricing, Square reminders). A field service platform fits companies dispatching technicians to job sites, and Servgrow includes auto job and appointment reminders on its GROW plan only (pricing).

For sensitive health workflows, see our healthcare text messaging guide. We do not provide compliance advice. For general bulk SMS beyond reminders, read our SimpleTexting review and our Text Request review for provider pricing at your volume.

The 25 providers that state reminder texts, priced at your volume

"API only" means the provider documents scheduled or reminder sends for developers and states no reminder feature in its web app. The month is the provider's cheapest published way to send that many texts, from the mass texting comparison; "not priced here" means that page does not price the provider. Providers we checked that state no reminder texts: Avochato, Clickatell, Community, Emotive, Heymarket, Klaviyo, Plivo, Postscript, Sendlane, Sinch, SlickText, Textline, Vonage, YepText.

How text message reminders work

You set the message once, choose the schedule, and the service sends each text at the time you set. EZ Texting describes the shape plainly on its own site. Set a message to repeat on the schedule you define. Textedly states the same range, daily, weekly, monthly or yearly, and Trumpia lets you schedule multiple reminder messages for one appointment.

One SMS holds 160 characters in the GSM-7 alphabet, or 70 once the text contains an emoji or another character outside it, and each part of a longer text is billed as one text. That length is the number the calculator above uses. It counts the segments your reminder text takes, multiplies by your appointments and reminders, and prices every provider's month at that volume.

What the providers publish for reminders

The split matters because it changes what you have to build. A web app reminder is a no-code feature inside the provider's product. An API send is one your own software triggers, so the reminder leaves your booking system directly.

Of the 39 providers read, 18 state reminder or recurring texts in their web app, 5 state scheduled or reminder sends for their API only, and 14 state no reminder feature on the pages read. BulkSMS and Infobip state reminders without saying which surface. ClickSend, Messente and TrueDialog state both. Messente names out-of-the-box connectors for Epic, Cerner, Allscripts and athenahealth, and Notifyre sends reminders through its dashboard or Zapier connected apps.

Weave states that patients can confirm or decline a reminder by reply and that Weave updates your calendar with the response, with reminders defaulting to the day before at 10:00 am, adjustable to any number of days or hours before. The full detail is in the Weave review.

At 600 texts a month, the months on the cheapest published plans run from $16.40 for Kudosity (formerly BurstSMS) to $57 for Textedly, and the other web app providers publish no price this site can compute for a month.

How to choose a text reminder service

Start with the surface. A web app reminder suits a front desk that types the schedule into the product. An API send suits software that already holds the appointments, and the best SMS APIs page covers that route in full.

Then price the month at your own volume, not the provider's example. A practice with 300 appointments and two reminders each sends 600 texts, and the gap between $16.40 and $57 at that volume is real money for one segment each. Check the trial terms before you commit, because a free trial ends. For sends beyond reminders, the mass texting comparison prices the same providers at higher volumes.

Text message reminder questions