Quick answer: Meta offers two routes. In the WhatsApp Business app you send each reminder yourself or schedule a business broadcast; we found no booking-triggered option. Automatic reminders need the WhatsApp Business Platform: an approved utility template with Confirm and Reschedule quick-reply buttons, sent by your booking system at each offset. A tap opens a 24-hour reply window.
If you are asking “how do I set up WhatsApp Business appointment reminders for my clients”, Meta gives you two products that automate very different amounts of the job. This guide covers both from Meta’s own pages, read on 20 October 2026: the WhatsApp Business app’s features, business broadcasts and Meta Business Agent pages, and, for the WhatsApp Business Platform (Cloud API), the developer documentation on template categorisation, components, review, time-to-live and service messages, plus the WhatsApp Business Messaging Policy (updated 23 September 2026). Meta’s developer site does not load from our server, so we read it through dated Internet Archive copies, listed at the end.
Running WhatsApp appointment reminders with Zian
Zian books appointments and follows up on WhatsApp, SMS and voice calls, so reminders run on the same platform that set the time. Its digital team includes an Appointment Show-Specialist agent for the stretch between booking and meeting. SmartReach AI™ chooses the message, channel and timing for each follow-up, and PrecisionPitch AI™ split-tests scripts and approaches against real outcomes. Zian also answers inbound calls 24/7 as an AI receptionist, works in 30+ languages, and connects to HubSpot, Salesforce, HighLevel and Zapier. Across the platform, 50,769+ qualified sales appointments have been set.
If you would rather not run the platform yourself, LeadsNow.ai (leadsnow.ai) is the done-for-you option. It is a pay-per-result appointment-setting service that runs on Zian and answers leads in under 60 seconds, 24/7. Zian is in a partnership-application beta and does not publish paid-plan prices. We could not find which Meta onboarding route it uses on zian.ai’s home or features pages as at 20 October 2026, so ask about that when you apply.
WhatsApp Business app vs API for appointment reminders
Meta’s FAQ puts the split plainly. The WhatsApp Business app is “free to use”, runs from a single device, “enables businesses to reach hundreds of customers” and offers “limited customization and integration with other tools”. The WhatsApp Business Platform gives “programmatic access” and can reach “millions of customers at a time”. Here is what that means for reminders:
| What you need for reminders | WhatsApp Business app | WhatsApp Business Platform (Cloud API) |
|---|---|---|
| A reminder sent automatically for each booking | No booking trigger described on Meta’s app pages (as at 20 October 2026). You send it yourself; quick replies are typing shortcuts | Yes. Your booking system or automation tool calls the Messages API with a template at each offset |
| Scheduling inside WhatsApp | Business broadcasts can be scheduled: one message to contacts you select, “available to eligible users in select countries” | Meta’s API reference lists a Schedules API that creates a “campaign schedule” from a template, an audience and a delivery time |
| Automatic replies | Greeting message for new customers; away message outside business hours; Meta Business Agent for “eligible businesses in select markets”, which Meta says “Books appointments and qualifies incoming leads” | Your own automation or AI agent, or Meta Business Agent (a Platform pricing category in Meta’s FAQ), inside the 24-hour customer service window, with escalation paths |
| Confirm / reschedule buttons | Business broadcasts can carry Book, Order and Call buttons | Up to 10 quick-reply buttons per template, each label up to 25 characters |
| Wording approval | No template review described | Every template is reviewed; a decision takes up to 24 hours |
| Messaging outside 24 hours of the customer’s last message | Not subject to the customer service window (Meta’s coexistence page) | Approved templates only |
| Stop a late reminder from arriving | Not described | Utility template time-to-live adjustable from 30 seconds to 12 hours (default 30 days) |
| Track who confirmed | Labels on chats, set by hand | Button taps arrive at your webhook as messages; your system records them |
| Cost | “Free to use”, per Meta’s FAQ | Charged per delivered message, by category and country |
| Opt-in | Required (the Business Messaging Policy covers the app) | Required, and only a template may start a conversation |
The one-line version: the WhatsApp Business app can remind people, but only the Business Platform can remind them automatically, appointment by appointment. Meta’s coexistence option links the two: through a Solution Partner or Tech Provider, a Business app number (app version 2.24.17 or later) also connects to the Cloud API, at a fixed 20 messages per second, and broadcast lists are disabled.
How to set up appointment reminders in the WhatsApp Business app
This route suits a business that books a handful of appointments a day and is happy to send the reminders by hand. Here is the sequence, with a first action and a finish state for each step.
- Complete the business profile. First action: add your address, hours and website. Meta’s policy requires a profile with customer-support contact details. Finished when the profile shows a phone number, email or website.
- Turn on a greeting message and an away message. The greeting goes automatically to new customers who start a chat. The away message answers anything that arrives outside your hours. Neither one is a reminder, but they cover the reply when someone answers your reminder at 10pm. Finished when a test message from another phone gets each reply.
- Save your reminder text as a quick reply. Quick replies are, in Meta’s words, “shortcuts for messages you frequently send”. Save one for the day-before reminder and one for directions. Finished when the saved shortcut fills the message box in a test chat.
- Create labels for the booking states. Labels “organize and filter” chats. Use three: Reminded, Confirmed and Reschedule. Finished when you can filter today’s chats by label.
- Send the reminders at a fixed time each day. Open tomorrow’s bookings, send the shortcut to each customer, fill in the time and label the chat Reminded. When someone replies, move the label. Finished when every booking for tomorrow carries a label.
- Optional: schedule a business broadcast. In Tools > business broadcasts, you select contacts, write the message, add buttons and choose to send now or later. Meta’s guide describes one message sent to the contacts you pick, and lists “RSVPs, reminders, and sales” among the outcomes its buttons can drive. That suits a notice that is the same for everyone, like a holiday closure or a clinic move. The guide does not describe a different appointment time for each contact. Business broadcasts are available to eligible users in select countries.
Where it breaks: every reminder is a person’s time, and nothing records who confirmed except the label you set. Meta describes the app as reaching “hundreds of customers” and offering limited integration. We could not find a Meta page describing a reminder in the Business app that is triggered by a booking or calendar, as at 20 October 2026. Meta’s Help Centre article on broadcasts loads only as a script shell from here, so we could not read it.
How to set up WhatsApp Business API appointment reminders
This is the route for reminders that send themselves. It assumes you already have Cloud API access: a business portfolio, a registered number, a permanent token and a webhook. If you don’t, our guide to applying for WhatsApp Business API access covers those 11 steps first.
- Fix your opt-in. The WhatsApp Business Messaging Policy lets you contact someone only if “(a) they have given you their mobile phone number or username; and (b) you have received opt-in permission from the recipient confirming that they wish to receive subsequent messages or calls from you.” Meta’s opt-in page adds three requirements: say clearly that the person is opting in to messages from your business, name the business, and comply with applicable law. The policy makes you “solely responsible” for the opt-in method, and opt-outs made on or off WhatsApp must be honoured. The booking form is the natural place to collect it. A tick-box reading “Send my appointment reminders by WhatsApp from [business name]” meets the first two requirements; the third depends on the law where you and your customers are. The same policy says not to use WhatsApp for telemedicine, or to send or request health-related information, where applicable regulations prohibit distributing it to systems that do not meet heightened requirements for health information, so a clinic should check that before a treatment name goes into a reminder. Finished when every new booking stores the opt-in with a timestamp.
- Check Template Library first. Meta’s Template Library holds pre-written templates that have “already been categorized as utility or authentication”. They have fixed text and editable parameters. If one matches your reminder, it saves a review; choosing “Customize template” sends it back to review. Finished when you have either picked a library template or decided to write your own.
- Write the reminder as a utility template. Meta categorises a template as utility only if it is non-promotional and specific to the user, or essential to them. The full test is in the next section. Finished when the draft contains nothing that sells.
- Add quick-reply buttons for Confirm, Reschedule and Cancel. Meta says a quick-reply button “immediately message[s] you with the specified text string when tapped”. That tap is the customer messaging you, and it is what opens the customer service window. Finished when the buttons appear in the WhatsApp Manager preview.
- Give each touch its own template and a time-to-live. Time-to-live (TTL) is how long Meta keeps retrying an undelivered message. For a utility template the default is 30 days, and you can set it anywhere from 30 seconds to 12 hours. You set it on the template itself, with the
message_send_ttl_secondsproperty. The 2-hour reminder therefore needs its own template with a short TTL, so a phone that comes back online after the appointment never receives it. Finished when each template has a TTL that fits its offset. - Submit with samples. Every variable needs a sample value. Meta says a decision “can take up to 24 hours”, and an appeal is decided within 24 hours. Finished when the status reads APPROVED and the category reads UTILITY. If the category came back as MARKETING, see the next section.
- Trigger the sends from your booking system. When a booking is made, moved or cancelled, your system creates, moves or deletes the queued sends for that booking. At each send time it checks the booking still exists, then calls the Messages API. Meta’s Schedules API creates campaign schedules for a template and an audience at one delivery time. Per-appointment timing is simpler to keep in the system that owns the calendar. Finished when a test booking 49 hours out produces every send on time.
- Handle the reply. Route Confirm, Reschedule and Cancel to the booking record. Free-form replies, and any AI agent replying to them, run inside the 24-hour window covered below. Finished when a Reschedule tap from a test phone ends with a new booking and no human typing.
Teams that would rather not build steps 3 to 8 can hand the conversation to an agent. Meta’s own Business Agent replies to customers and, Meta says, books appointments; Meta describes connecting it to the tools that manage your calendar as a future capability. Zian’s agents book appointments and follow up across WhatsApp, SMS and voice calls, and Zian is taking applications during its partnership-application beta.
Is a WhatsApp appointment reminder a utility or a marketing template?
Usually utility, but Meta decides, and one sentence can change the answer. Meta’s template categorisation page (updated 15 September 2026) says a utility template must meet both of two criteria. It must be “non-promotional, not containing any promotional or persuasive intent”. It must also be either “specific to or requested by the user (clearly related to their order, account, services, or transactions)” or “essential or critical to the user”. A reminder about an appointment the customer booked fits the first branch. Meta’s own case study of Vitaldent, a Spanish dental network, describes appointment reminders, confirmations and rescheduling notices sent as utility messages, each with the option to confirm, cancel or reschedule.
The sentence that cuts the other way: Meta’s utility examples cover opt-in management, orders, account alerts, feedback surveys and continuing a conversation begun on another channel, and none of them is an appointment reminder. The category is a judgement on the template’s content. Three rules decide what happens:
- Mixed content is marketing. A reminder that adds “book your next visit and save 10%” becomes an order update with a promotion, which Meta lists as marketing.
- A mis-filed template is approved as marketing. Since 9 April 2025, a template submitted as UTILITY that Meta decides is MARKETING is approved as MARKETING. You can request a review within 60 days.
- Approved templates are re-checked. Meta reviews approved templates on a recurring basis. A utility template that should be marketing is switched with one day’s notice, or with none for a business that has been warned for misuse. Meta’s time-to-live page adds that a reclassification clears the template’s custom TTL, and a marketing template’s TTL cannot be set below 12 hours, so a reclassified 2-hour reminder can no longer be made to expire before the appointment.
A category switch matters because Meta prices each category differently. Our breakdown of WhatsApp Business API cost per message has the current rates. Repeated misclassification can also bring restrictions, which our WhatsApp Business account restriction guide maps notice by notice.
Anatomy of a WhatsApp reminder template
Each row is a part of the template, the rule Meta publishes for it, and how the reminder below meets it. The rules come from Meta’s Template fundamentals, Template components, Template review and Time-to-live pages.
| Component | Meta’s rule | In our reminder |
|---|---|---|
| Name | Up to 512 characters, lowercase letters, numbers and underscores; the same name can be reused for another language | appointment_reminder_24h |
| Category | Utility only if non-promotional and specific to the user (or essential) | UTILITY: no offer, no upsell |
| Language | You set a language code; Meta does not translate your text | en_US (one template per language) |
| Header (optional) | One text header, up to 60 characters, 1 parameter | “Appointment reminder”, no parameter |
| Body (required) | Up to 1,024 characters; named parameters are lowercase letters and underscores, such as {{first_name}}; positional {{1}} is the default | 191 characters, 5 named parameters |
| Parameter formatting | No missing or mismatched braces; no #, $ or % in parameters; positional numbers in sequence; not too many parameters for the length; cannot start or end with a parameter | Starts with “Hi”, ends with “reschedule.” |
| Samples | A sample value for every parameter | Sam, initial consultation, Example Clinic, Thursday 23 October, 10:30 am |
| Footer (optional) | Text only, up to 60 characters | “Reply STOP to end WhatsApp reminders” (36) |
| Buttons (optional) | Up to 10 in total; up to 10 quick replies, 2 URL buttons, 1 phone-number button; labels up to 25 characters; quick replies grouped together, not mixed between other types | Confirm, Reschedule, Cancel appointment (largest label 18 characters) |
| Desktop display | A template with 4 or more buttons, or quick replies mixed with another button type, cannot be viewed on WhatsApp desktop | 3 quick replies only, so it shows on desktop |
| Time-to-live | Utility: default 30 days, adjustable from 30 to 43,200 seconds (12 hours); set on the template | 43,200 seconds for the 24-hour touch |
| Review | Up to 24 hours; duplicates of an existing template’s body and footer are rejected | One distinct template per touch |
Appointment reminder message examples that stay within Meta’s rules
This is the 24-hour template as a creation payload. We ran it through a script that checks the rules in the table above: name characters, parameter names, start and end of the body, sample values, lengths, button count, grouping and the utility TTL range. It passed. A deliberately broken copy produced nine errors, among them a capitalised parameter, a body starting with a variable, a 34-character button label, mixed button groups and a 24-hour TTL. The script cannot judge promotional intent; only Meta’s review does that.
{
"name": "appointment_reminder_24h",
"language": "en_US",
"category": "utility",
"parameter_format": "named",
"message_send_ttl_seconds": 43200,
"components": [
{"type": "header", "format": "text", "text": "Appointment reminder"},
{"type": "body",
"text": "Hi {{first_name}}, this is a reminder of your {{service_name}} appointment with {{business_name}} on {{appointment_date}} at {{appointment_time}}. Tap a button below to confirm or reschedule.",
"example": {"body_text_named_params": [
{"param_name": "first_name", "example": "Sam"},
{"param_name": "service_name", "example": "initial consultation"},
{"param_name": "business_name", "example": "Example Clinic"},
{"param_name": "appointment_date", "example": "Thursday 23 October"},
{"param_name": "appointment_time", "example": "10:30 am"}]}},
{"type": "footer", "text": "Reply STOP to end WhatsApp reminders"},
{"type": "buttons", "buttons": [
{"type": "quick_reply", "text": "Confirm"},
{"type": "quick_reply", "text": "Reschedule"},
{"type": "quick_reply", "text": "Cancel appointment"}]}
]
}Two more bodies for the same booking, each a separate template so neither duplicates the other:
- 48 hours out (appointment_reminder_48h): “Hi {{first_name}}, your {{service_name}} appointment with {{business_name}} is on {{appointment_date}} at {{appointment_time}}. If that time no longer suits, tap Reschedule and we will offer new times.” Buttons: Confirm, Reschedule.
- 2 hours out (appointment_reminder_2h): “Hi {{first_name}}, see you at {{appointment_time}} today at {{business_address}}. Tap Running late if you need us to hold your time.” Button: Running late. TTL: 3,600 seconds.
All three name the specific booking and none offers anything, which is the line Meta draws between utility and marketing.
WhatsApp reminder timing: a 48 / 24 / 2-hour plan
This is a method, not a measured optimum: adjust the offsets against your own cancellations and no-shows. What it pins down is the WhatsApp mechanics of each touch. For the research on reminders and show rates, see our guide to how AI agents maximise sales-call show rates.
| Touch | Send at | Message type | TTL to set | Job | If no reply |
|---|---|---|---|---|---|
| Booking confirmation | At booking | Free-form if the booking happened in an open WhatsApp chat; otherwise a utility template | Up to 12 hours (template) | Restate date, time and place; say reminders will come by WhatsApp | Nothing; the 48-hour touch follows |
| 48-hour reminder | Appointment minus 48 hours | Utility template, Confirm and Reschedule | 12 hours (43,200 s) | Surface cancellations while the slot can still be refilled | Mark unconfirmed; the 24-hour touch follows |
| 24-hour reminder | Appointment minus 24 hours | Utility template, Confirm, Reschedule and Cancel | 12 hours (43,200 s) | Get an explicit yes or no | Hand the booking to a person or another channel, such as a call |
| 2-hour reminder | Appointment minus 2 hours | Utility template, Running late | 1 hour (3,600 s) | Logistics: address, parking, who to ask for | None; a dropped message after the TTL is intended |
Why every scheduled touch is a template, even when a window might be open. Meta’s pages describe a custom TTL only for templates. Any other message has the 30-day default. A free-form 2-hour reminder that cannot be delivered can therefore keep retrying long after the appointment. A template also arrives with approved wording whether or not the customer has replied recently, so your system never has to guess which state it is in.
The window arithmetic shows why guessing fails. Say a customer taps Confirm on the 48-hour reminder at 47 hours out. The window then runs until 23 hours out, so the 24-hour touch falls inside it. If instead their last message was at 49 hours out, for example when they booked inside the chat, and they ignore the 48-hour reminder, the window closes at 25 hours out and the 24-hour touch falls outside. One reply, or the lack of one, changes which message types are allowed. Sending the template every time removes the question.
What happens when the customer replies to a WhatsApp reminder
Meta’s Service messages page (updated 21 May 2026) says: “When a WhatsApp user messages you or calls you, a 24-hour timer called a customer service window starts. If the user messages or calls you again before the timer expires, the timer resets to 24 hours.” A quick-reply tap counts, because the button sends you its text as a message. Inside the window you can send free-form messages: text, images, location, interactive lists of options such as open time slots, reply-button messages with up to three choices, and WhatsApp Flows, which Meta says can be used “to book appointments”. Outside it, you can send templates only.
Three conditions apply to what you send inside the window:
- Automation needs escalation paths. The policy says “You may use automation when responding during the 24-hour window, but must also have available prompt, clear, and direct escalation paths.” Meta lists six: in-chat human agent transfer, phone number, email, web support on the business website, in-store visits, and a support form.
- Replies are charged after an allowance. From 1 October 2026, Meta charges for free-form service messages after the first 1,000 per business phone number each month. Utility templates are charged per delivered message. Rates are on our WhatsApp cost-per-message page.
- The window can occasionally fail. Meta lists a known issue: “In rare cases, you may receive a message from a WhatsApp user but be unable to respond within the customer service window.” Your reschedule flow should fall back to a template, or a phone call, if a free-form send is refused.
A Reschedule tap is the best moment in the sequence: the customer still wants an appointment and is holding their phone. Answer with an interactive list of real open times, book the chosen one and confirm it, all inside the window the tap opened.
Want AI agents that book appointments and follow up on WhatsApp, SMS and calls? Zian’s digital team includes an Appointment Show-Specialist, and Zian is in a partnership-application beta.
Frequently asked questions
Can the WhatsApp Business app send automatic appointment reminders?
Not per appointment. Meta’s Business app pages describe greeting and away messages, quick-reply shortcuts, labels and business broadcasts, which can be scheduled to contacts you choose in eligible countries. Meta Business Agent replies to customers and, Meta says, books appointments, but Meta describes calendar connections as a future capability. As at 20 October 2026 we could not find a Meta page describing reminders triggered by a booking or calendar in the app. For that you need the WhatsApp Business Platform and an approved template.
Is an appointment reminder a utility template on WhatsApp?
Usually, if it is non-promotional and about the customer’s own booking. Meta decides the category from the content. A template submitted as utility that Meta judges to be marketing is approved as marketing, and approved templates are re-checked, with one day’s notice before a switch. Adding an offer or a rebooking discount makes it marketing.
Do I need opt-in to send WhatsApp appointment reminders?
Yes. The WhatsApp Business Messaging Policy lets you contact people only if they have given you their mobile number or username and you have received opt-in permission confirming they want subsequent messages or calls from you. Meta’s opt-in page adds that you must say they are opting in, name your business and comply with applicable law.
How far in advance should a WhatsApp appointment reminder be sent?
A workable starting plan is 48 hours, 24 hours and 2 hours before, each as its own utility template, then adjusted against your own cancellations. Set a short time-to-live on the 2-hour template, for example 3,600 seconds, so an undelivered reminder is dropped instead of arriving after the appointment.
What happens if a customer taps Confirm or Reschedule?
The tap sends you the button’s text as a message, which opens a 24-hour customer service window. Inside it you can reply with free-form messages, interactive lists of times or a WhatsApp Flow. Automated replies are allowed if a prompt, clear and direct escalation path to a person is available.
How long does WhatsApp template approval take?
Meta’s template review page says a decision can take up to 24 hours, and an appeal is decided within 24 hours. Templates from Meta’s Template Library are already categorised. Customising one sends it back to review.
Can I use the WhatsApp Business app and the API on the same number?
Yes, through a Meta Solution Partner or Tech Provider, using what Meta calls onboarding WhatsApp Business app users, or coexistence. The app must be version 2.24.17 or later. The number is fixed at 20 messages per second, and broadcast lists are disabled once you onboard.
Where every figure on this page comes from
| Figure | Who published it | Link | Date read |
|---|---|---|---|
| 24-hour customer service window, reset on each user message or call; templates only outside it; known issue; interactive reply buttons up to three; Flows “to book appointments”; 30-day default TTL for messages other than authentication templates | Meta, Service messages (updated 21 May 2026; read via Internet Archive copy captured 14 Oct 2026) | developers.facebook.com/…/messages/send-messages | 20 Oct 2026 |
| Utility criteria; mixed content is marketing; UTILITY judged MARKETING approved as MARKETING since 9 April 2025; review within 60 days; recurring re-check; one day’s notice, none after a warning | Meta, Template categorization (updated 15 Sep 2026; archived copy captured 12 Oct 2026) | developers.facebook.com/…/templates/template-categorization | 20 Oct 2026 |
| Header 60 characters and 1 parameter; body 1,024 characters; footer 60 characters; up to 10 buttons; up to 10 quick replies; 2 URL buttons; 1 phone-number button; labels 25 characters; grouping rule; desktop display limit | Meta, Template components (updated 24 Jun 2026; archived copy captured 15 Oct 2026) | developers.facebook.com/…/templates/components | 20 Oct 2026 |
| Template name up to 512 characters, lowercase alphanumerics and underscores; named parameter format; positional default; Meta does not translate | Meta, Template fundamentals (updated 21 May 2026; archived copy captured 7 Oct 2026) | developers.facebook.com/…/templates/overview | 20 Oct 2026 |
| Review up to 24 hours; appeal within 24 hours; parameter-formatting rejection reasons; duplicate rule | Meta, Template review (updated 17 Jun 2026; archived copy captured 12 Oct 2026) | developers.facebook.com/…/templates/template-review | 20 Oct 2026 |
| Utility TTL default 30 days; adjustable 30 to 43,200 seconds (12 hours); set on the template; custom TTL cleared on reclassification; marketing range 12 hours to 30 days | Meta, Configure message time-to-live (updated 21 May 2026; archived copy captured 16 Jun 2026, same values in the copy captured 23 Sep 2026) | developers.facebook.com/…/templates/time-to-live | 20 Oct 2026 |
| Opt-in limbs (a) and (b); “solely responsible”; opt-outs on or off WhatsApp; templates only to start a conversation; six escalation paths; health-related information limb; policy covers the Business app and the Platform | WhatsApp, Business Messaging Policy (last updated 23 Sep 2026) | whatsappbusiness.com/policy | 20 Oct 2026 |
| Three opt-in requirements | Meta, Get opt-in for WhatsApp (updated 16 Jun 2026; archived copy captured 7 Jul 2026, same wording in the copy captured 6 Oct 2026) | developers.facebook.com/…/getting-opt-in | 20 Oct 2026 |
| Business app: greeting, away messages, quick replies, labels; business broadcasts scheduling, buttons, “RSVPs, reminders, and sales”, eligible users in select countries | WhatsApp, Business App Features and the business broadcasts guide | whatsappbusiness.com/products/business-app-features; business broadcasts guide | 20 Oct 2026 |
| Business app “free to use”, “hundreds of customers”; Platform “millions”; per-message charging by category and market; 1,000 free service messages per number per month from 1 Oct 2026 | WhatsApp, WhatsApp for Business FAQ | whatsappbusiness.com/resources/faq | 20 Oct 2026 |
| Meta Business Agent in the Business app, eligible businesses in select markets; “Books appointments and qualifies incoming leads”; works alongside the Business Platform; calendar tools a future capability | WhatsApp, Meta Business Agent on WhatsApp; Conversations 2026 announcement (3 June 2026) | whatsappbusiness.com/products/business-app-ai-agent; whatsappbusiness.com/blog/introducing-meta-business-agent-ai | 20 Oct 2026 |
| Coexistence: Solution Partner or Tech Provider; app 2.24.17 or later; 20 messages per second; app messages not subject to the window; broadcast lists disabled | Meta, Onboard WhatsApp Business app users (updated 26 Jun 2026; archived copy captured 28 Sep 2026) | developers.facebook.com/…/onboarding-business-app-users | 20 Oct 2026 |
| Schedules API creates a campaign schedule from a template ID, audience ID and delivery time | Meta, WhatsApp Business Account Schedules API reference (archived Markdown copy captured 29 Aug 2026) | developers.facebook.com/…/schedules-api | 20 Oct 2026 |
| Template Library templates pre-categorised; customising sends a template to review | Meta, Template Library (updated 9 Apr 2026; archived copy captured 13 May 2026) | developers.facebook.com/…/templates/template-library | 20 Oct 2026 |
| Appointment reminders, confirmations and rescheduling sent as utility messages with confirm, cancel or reschedule options | WhatsApp, Vitaldent success story | whatsappbusiness.com/resources/success-stories/vitaldent | 20 Oct 2026 |
| 48 / 24 / 2-hour plan, TTL choices and window arithmetic; template checked by script (191-character body, 5 parameters) | Zian AI, method and calculation on this page (not a measurement) | This page | 20 Oct 2026 |
| 50,769+ qualified sales appointments set | Zian AI (first-party published figure) | zian.ai | 20 Oct 2026 |