What it connects to, and what it needs.
Book is an appointment booking system on its own: a page, a diary, a reminder ladder and an export. It gets better with the rest of Centilio — the record in Relate, the deposit in Bill, the room in Meet, the page embedded on Site — and this page says which parts are at launch and which come after, rather than showing sixteen logos and letting you find out.
Product design preview · Book has not shipped. All plans, integrations and screens are proposals.
Book is not available yet. These are proposed screens, features and prices—not a beta or a live booking service. The interactive diary uses fictional data; no appointment, message, deposit or customer record leaves this page.
What is at launch and what is after.
| Connects to | What it does | Plan | When |
|---|---|---|---|
| Google Calendar | Two-way. A personal appointment blocks the slot. | Every plan | At launch |
| Microsoft 365 and Outlook.com | Two-way, same behaviour. | Every plan | At launch |
| Apple Calendar | Read-only at first, through CalDAV. | Every plan | After launch |
| Centilio Relate | Every booking becomes a line on the customer record. | Every plan | At launch |
| Centilio Bill | Deposits held, applied to the invoice, chased if unpaid. | Pro | At launch |
| Centilio Meet | A video room created for a remote appointment. | Pro | At launch |
| Centilio Site | The booking page as a block on your website. | Every plan | At launch |
| Centilio Pulse | The booking link as the call to action at the end of a sequence. | Pro | At launch |
| Centilio Care | A customer who needs to move an appointment becomes a ticket. | Pro | After launch |
| Stripe | Deposits and payments, through Bill. | Pro | At launch |
| SMS providers | Reminders where the country and the carrier allow it. | Pro | At launch |
| WhatsApp Business | Reminders where messaging rules permit, with email as the fallback. | Pro | After launch |
| Zoom and Google Meet | For businesses that already run on them. | Pro | After launch |
| Webhooks | Booked, moved, cancelled, no-show, deposit taken. | Business | At launch |
| REST API | Read and write the diary. | Business | At launch |
| Zapier | After the webhooks, because webhooks are what a developer wants. | Business | After launch |
Book sits between tools in the same suite.
About connecting things.
What does Book need from the rest of Centilio?
Relate for the customer record, Bill for deposits and invoices, Account for who can see what. Meet if the appointment is on video, Pulse if the booking link is the call to action at the end of a sequence, Site if the page is embedded on your website.
Can I use Book without the rest?
Yes. It is a booking page, a diary and a reminder ladder on its own. The record and the deposit are better when Relate and Bill are there, and the page will say so rather than pretending otherwise.
Does it work with Google Calendar?
Two-way, on every plan. Same for Microsoft 365 and Outlook.com.
Is there an API?
On Business: API, webhooks and an audit export.
Zapier?
After launch. The webhooks come first because they are what a developer actually wants.
What people add after Book.
What the booking touches on its way through: the record, the deposit, the reminder and the room.
The proposed shared record connects these products as they launch. Follow each product page for its current stage.
Be told when Book opens.
Wave 2 is the next build after the live tools. Leave your name and you will hear before the announcement — and tell us what your no-show rate is today, because that is the number we intend to move.