Appointment reminders by phone call or WhatsApp: when to use each
When to remind an appointment on WhatsApp, when to use a voice agent call and how to combine both so customers confirm or reschedule in time.
Two channels, one goal
A reminder gets the customer to confirm, reschedule or cancel in time. WhatsApp leaves the details in writing; a call gets an answer on the spot and reaches people who don't read messages.
| Criterion | Voice agent call | |
|---|---|---|
| Billing | A WhatsApp template that Meta bills to your business portfolio | Prepaid voice balance from US$0.18/min; unanswered calls are free |
| What gets recorded | The message and the reply in the conversation | Recording, summary and transcript in the same conversation |
| Rescheduling | The customer replies and the agent offers slots | The agent offers slots during the call |
| When it goes out | Before the appointment | Before the appointment, never after the time, with a WhatsApp fallback |
| Plans | Every appointment plan | Every appointment plan |
When to add the call
- Long or high-value appointments, where a no-show leaves a gap that is hard to fill.
- Customers who don't reply to messages or prefer to talk.
- First appointments, when the person doesn't know the business yet.
- WhatsApp reminders that got no reply.
When WhatsApp is enough
- Routine check-ups and regular customers.
- Reminders with details worth keeping in writing: address, preparation or documents.
- Businesses with many short appointments a day.
How to combine them in Wenzy
- 1WhatsApp as the baseTurn on automatic WhatsApp reminders for every appointment.
- 2A call as reinforcementAdd the voice agent call to reminders: when nobody answers, the WhatsApp fallback goes out.
- 3Rescheduling on the spotIf the customer can't make it, the agent finds another slot on the same call and saves it to the calendar.
- 4Follow-up in Automatic modeOn Profesional and Clínica, smart follow-up lets the AI choose between WhatsApp and a call based on the conversation.
Frequently asked questions
Does the reminder call replace the WhatsApp one?
No. The call comes with a WhatsApp fallback when nobody answers, and both channels live in the customer's same conversation.
Does the agent call after the appointment time?
No. Reminder calls never go out after the appointment time.
What does the agent ask for on the call?
Only name, phone and the general reason. It gives no medical, legal or financial advice.
How much does each reminder cost?
The WhatsApp one uses a template that Meta bills to your business portfolio. The call draws on the voice balance, from US$0.18/min, and is free when nobody answers.
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