What a scheduling link sells you
A page, a queue and a per-seat bill. Calendly $10 to $16 a seat, Cal.com $12 a user, Acuity $20 to $61 by calendar band. The easy half
CENTILIO BOOK / SELL · EMBER
Every scheduling tool sells you a link. This one sells a slot that is really free.
A shared diary that knows who is really free. Book is designed to connect the appointment, deposit, reminder and customer record—at one proposed price for the business.
Read the full product concept
Centilio Book is appointment scheduling software for a business where more than one person shares a diary: a clinic, a salon, a studio, a tuition centre. Customers pick a time that has been checked against every clinician's own calendar as the page was drawn, pay a deposit if you ask, get reminded, and arrive on a customer record that already has their history. Priced per business: free for one calendar, then $19 a month with every staff calendar included and unlimited bookings on every plan — which is not how this category prices any of it.
not shipped · wave 2every staff calendar includedunlimited bookings, alwaysno onboarding fee proposed
Product design preview · Book has not shipped. All plans, integrations and screens are proposals.
Book has not shipped yet.
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.
Try it · the console as designed, sample data
14 slots offered today. All 14 of them are real.
Explore one fictional Tuesday: three clinicians, five appointments and two personal-calendar commitments. Turn sample sync off to see the false availability. Taking a sample booking changes only this page.
Interactive sample only. No appointment, payment, reminder or customer record is created.
Tuesday · Harbour Physio, Leeds
Amelia ClarkePhysiotherapistDaniel OkaforPhysiotherapistHannah KimSports therapist
09:00Jack ThompsonBack assessment · deposit
free
free
10:00free
Liam O’ConnorKnee rehab · deposit
free
11:00free
Noah PatelKnee rehab · deposit
free
12:00lunch
lunch
lunch
13:00free
free
Sofia ReyesSports massage · deposit
14:00Marta NowakFollow-up
free
free
15:00free
School runGoogle Calendar
free
16:00free
free
Clinical supervisionOutlook
Five appointments were already here. Lunch is not for sale. The two dashed grey slots are in somebody’s personal calendar, not in Book.
What the customer sees
harbourphysio.centilio.site/book
10:0011:0013:0015:0016:0009:0013:0014:0016:0009:0010:0011:0014:0015:00
All 14 are real. Every one is checked against the clinician’s own calendar at the moment the page is drawn, not overnight.
This is the only claim the product makes. A slot on the page is a slot in a diary. Everything else — the reminder, the deposit, the record — follows from that being true.
Today
Slots offered14
Really free14
Protected by calendar sync2
Appointments5
Deposits held4
Sample reminders5 illustrated
Harbour Physio · Leeds. 5 booked, 14 left to sell.
The link was never the hard part
Knowing the slot is free is.
Why the diary still goes wrong
Because one person put a school run in their own calendar, the page never saw it, and a customer is now sitting in reception at three o'clock. The actual problem
What Book does instead
Checks every person's own calendar at the moment the page is drawn, holds the deposit, sends the ladder, and files the visit on a customer record. The hard half
The wedge
Four things this category gets wrong.
The meter charges you for growing
Per seat, per calendar band, per location or per booking Per business, everyone in
Free plans shaped to fail
One event type. Fifty bookings a month. Seven days. Unlimited bookings, free
Sync that runs overnight
Yesterday's availability, sold this morning Checked as the page draws
The booking goes nowhere
An event in a calendar, and a customer you know nothing about A record in Relate
Filed by itself
Book sits between tools in the same suite.
Celia in Book
She proposes and she writes. She does not decide.
Asked for "sometime next week", Celia offers three times that suit both diaries rather than a wall of availability. She writes the reminders in your words, for your service, so you do not have to author five templates before you can take a booking.
When somebody does not turn up she drafts the re-booking message and stops, because the right thing to say to somebody whose car broke down is not the right thing to say to somebody who does this every month — and only a person knows which one they are.
Features
The page, the rules, the reminders, the money, Celia and the record.
All features, by plan →
A booking page that tells the truth
Every slot offered is checked against each person's own calendar at the moment the page is drawn.
FreeTwo-way calendar sync
Google, Microsoft 365 and Outlook.com. A dentist appointment in a personal calendar blocks the slot.
FreeUnlimited bookings
On every plan including Free. Nothing in Book is metered by how much business you do.
FreeOne page per person, service or place
A clinic page, a page per clinician, or a page for one room. Same diary underneath.
FreeEmbed it on your Site
One block on a Centilio Site page, or a script tag on whatever you already run.
FreeYour own domain
book.yourbusiness.com, your colours, your logo, no Centilio badge.
BusinessServices with their own rules
Duration, who can deliver it, buffer after, deposit, and the form that comes with it.
FreeBuffers and travel time
Fifteen minutes to write notes, or forty to drive across town.
ProThe booking is not the end of it
A deposit held, an invoice raised, a record kept.
A scheduling link stops at "time booked". For a clinic or a salon that is about a third of the job: the deposit has to be held and then applied to the invoice, the intake form has to be attached to the appointment rather than a spreadsheet, and the visit has to join the three previous ones on a record somebody can read before the customer walks in.
That is why Book is in the same suite as Relate and Bill rather than integrating with them. 4 of today's 5 appointments are secured by a deposit, and every one of them will become an invoice without anybody typing it twice.
Pricing · per business, every staff calendar included
Unlimited bookings. Unlimited people. One price.
Proposed, in US dollars, billed through Stripe; annual rates are proposed monthly equivalents, billed for 12 months. Nothing is charged until Book ships.
Proposed prices per business. Free includes one staff calendar; Pro includes every staff calendar. Annual billing is a 12-month commitment at the displayed monthly equivalent. Confirm final launch terms and applicable taxes.
US $0
per business / month
US $0 for one month
For one person taking bookings
- 1 staff calendar
- Unlimited bookings
- Two-way calendar sync
- Booking page on a Centilio address
- Email reminders and one-tap reschedule
- Every booking on a customer record
- Full export, any time
US $19
per business / month
US $19 for one month
For a business where several people share a diary
- Everything in Free
- Unlimited staff calendars
- SMS reminders
- Deposits and payment through Bill
- Group and class bookings
- Buffers, travel time and intake forms
- Utilisation and your own no-show rate
US $39
per business / month
US $39 for one month
For several places, or rooms and chairs to allocate
- Everything in Pro
- Unlimited locations
- Resources: rooms, chairs, bays
- Routing forms
- Your own domain and no Centilio badge
- Roles and approval rules
- API, webhooks, audit export
Prices are proposals, excluding taxes. Annual totals use the rounded monthly equivalents × 12. No exact 20% discount or available checkout is promised.
Questions
Booking questions, answered plainly.
Can I use Book today?
No. Book has not shipped: there is no app and no beta. These pages are the product as designed, and the console above is that design running in your browser with sample data. Relate, the customer record a booking lands on, is in the same wave.
What should I use in the meantime?
For one person, Cal.com's free plan: one user, unlimited event types and calendars, and it costs nothing. For a salon or clinic that needs it working this week, Setmore is free for up to four users with unlimited appointments, and we say so on its comparison page.
There are twenty scheduling tools. Why another one?
Because all of them charge you for growing. Calendly is $10 to $16 per seat, Cal.com $12 per user, Acuity changes plan at your second calendar and again at your seventh, Square is $49 per location, and SimplyBook.me counts your bookings. Book is one price for the business with every staff calendar included.
What is the number on the console?
How many of the slots offered to a customer are really free. It starts at 14 out of 14. Turn two-way calendar sync off and the page offers 16 — the extra two being a school run and a supervision session that live in somebody's personal calendar. That is how double bookings actually happen, and it is the only claim this product makes.
Is this just a scheduling link?
No, and the difference matters once more than one person shares a diary. A link books a time. Book checks every clinician's own calendar as the page is drawn, holds a deposit, sends the reminder ladder, notices the no-show, and puts the whole thing on a customer record in Relate that already has the history.
Will it stop no-shows?
It is designed to help; no outcome is guaranteed. Nothing stops them, and any vendor quoting you a percentage is guessing about your business. What Book will show you is your own no-show rate before and after, from your own diary, and deposits are one possible approach to test.
Does it replace my practice management system?
No. Book schedules, reminds, takes a deposit and files the visit. Clinical charting, insurance claims and a point of sale are not built and are not planned. A dental practice needs a dental PMS and should keep it.
What does it cost?
Proposed: free for one staff calendar with unlimited bookings, then $19 a month for the whole business with unlimited staff calendars, and $39 for several locations. Nothing is charged until Book ships.
Next for you
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.