The right choice when
- No-shows cost you a slot every week.
- Staff phone clients the day before to confirm.
- Several people's calendars need the same rules.
Integration · Google Calendar + WhatsApp
Appointment reminders on WhatsApp. Confirm or reschedule with a tap.
Appointments in Google Calendar send a WhatsApp reminder the day before and an hour before, and the client can confirm or ask to reschedule with a tap, which updates the calendar.
- Google Calendar
An appointment is booked with the client's number.
- Connector
Schedules the reminders and reads the reply.
- WhatsApp
The client confirms or asks to move it; the calendar updates.
Only clients who agreed to WhatsApp are messaged.
01 / Is this the one
Is this the connection you need?
It suits a clinic, studio or consultancy that books in Google Calendar.
Look elsewhere when
- Your booking tool already sends WhatsApp reminders.
- Appointments are not in Google Calendar, or have no phone numbers.
- Your clients have not agreed to WhatsApp messages.
02 / What the work covers
What the work covers.
Reminders first, then confirmations and reschedule requests.
- 01
Rules and wording
When reminders go, what they say, and what happens on a reply.
- 02
Calendar access
Access to the calendars involved only, with a service account or each person's consent.
- 03
WhatsApp templates
The business number and the templates Meta must approve.
- 04
Log and handover
Every reminder and reply logged. Code and accounts handed over.
03 / Limits and risks
Where it can go wrong.
WhatsApp sets the rules for messages you start
A message the business sends first must use a template Meta has approved, and Meta charges for most of them. Replies within 24 hours of the customer's last message are free-form.
A calendar entry needs a number
Reminders only work when the booking holds the client's phone number in a fixed place. We agree where with your team.
Health data needs care
For a clinic, a reminder should not reveal the reason for the visit. Templates are written with that in mind.
04 / What we can show
The same idea, as our own product.
ZeroDelay.si connects business software to WhatsApp, Telegram and the web, so a team asks and gets answers, and staff send updates that wait for approval. FocusPulse, our market-news product, already delivers its briefings on Telegram.
What this does not show
A client project. ZeroDelay.si is in early access, and we have no published client case study of this integration.
05 / What to do next
Price it or talk it through.
The first step is a free scoping call about how you book and confirm appointments today. A written estimate follows.
01
Estimate the cost
02A price range for your build in four steps.
Chatbots and bots
03Answers in a conversation, on your channels.
Tally to WhatsApp
04Sales, dues and stock from Tally, on WhatsApp.
Zoho Books to WhatsApp
05Invoice and payment reminders from Zoho Books.
All integrations
Every connection we build.
A little clarity
Before sending reminders on WhatsApp.
Can we see it working?
Yes. This connection is built and tested by our team, and we can demo it for you on a free call before you decide anything.
Does it work with Outlook calendars?
Yes, through Microsoft's API, in the same way.
Can clients book from WhatsApp?
Yes, as a later step: a simple flow that offers free slots from the calendar.
Is there not an app for this already?
Sometimes there is, and if a vendor's own app or a no-code tool does what you need, use it: it is cheaper. A built connection earns its place when the rules are yours, such as which records go, who sees what, what happens when the two systems disagree, or when the volume makes per-task pricing expensive.
What does it cost?
It depends on how many calendars and reminder rules there are. First releases at NSDBytes start from $5,000. The project cost estimator gives a range, and a fixed quote follows a free scoping call. Charges from the services themselves, such as WhatsApp messages, API plans and hosting, are billed by those providers and are separate.
Who owns the connection once it is built?
You do. The code, the server it runs on and the accounts with each provider are yours once the final invoice is paid. We can run and maintain it afterwards if you want, but you are never locked in.
Start wherever you are
Bring last week's no-shows.
We'll show you the reminders that could have saved those slots.
Want certainty before you commit? Start with a scoping project, $500