Meetings always find a slot. It’s the work that ends up with no time.
Sync puts appointments, tasks and focus blocks on the same grid — and treats a focus block as a real commitment. It works offline and resends on its own once the connection returns.
Included for Centriu clients · Android, iOS and browser · Works offline
Thursday
Illustrative data09:00 – 11:00
Focus protectedClosing the proposal
11:30 – 12:00
MeetingWeekly alignment
14:00 – 14:45
Task on the gridReview supplier contract
Meeting request declined
It falls inside the focus block — Sync offers the next free slot
Illustrative data — calendar built for this page.
The day ends and what mattered wasn’t done
It isn’t a lack of organisation. Calendars only know how to defend meetings — the rest of the work has no one protecting it.
The calendar shows meetings; the work lives in another app’s list
Appointments in one place, tasks in another, notes in a third. Nobody can see the whole day at once, so tasks become intentions and meetings become the default priority — not because they were worth more.
Anyone books over the only free slot
Empty space on a calendar reads as an invitation. The time that existed for thinking, writing or deciding vanishes with the first accepted invite, and the bill arrives at night or on the weekend.
Away from the desk, the record is lost
Lift, travel, a client with no signal. The appointment goes on paper for later — and later never comes. Or worse: two devices change the same calendar and nobody knows which version stuck.
From an improvised day to a day that fits
The path Sync organises — and the point where it says no on your behalf.
“Time that isn’t on the calendar isn’t free time: it’s undefended time.”
- Appointments, tasks and focus blocks enter the same grid.
- A meeting that breaks the daily or weekly limit is stopped before it is saved.
- Working hours are declared once and start to count.
- The concentration block takes real space, like a meeting.
- Whoever tries to book over it receives the next free slot.
- Routines repeat on their own, without weekly rescheduling.
- Offline, the change is saved on the device.
- When the network returns, the queue is resent on its own.
- If two devices disagree, there is a rule to decide.
- At the end of the week you can see how much time became meetings.
The defended hour — and what happens when the network drops
Three illustrative screens: the week’s grid, the queue that loses nothing and the read of the period.
View 1 — the week
Illustrative dataWhere focus is booked
Mon
Tue
Wed
Thu
Fri
- Focus block
- Meeting
- Task on the grid
Wednesday morning is reserved for deep work. A meeting request in that window receives the next free slot instead of being accepted by default.
View 2 — offline
Illustrative dataThe queue that loses nothing
Device status
No internet — changes are still accepted
- Appointment created at the client · awaiting upload
- Time changed · awaiting upload
- Task completed · awaiting upload
When the network returns
The queue is resent on its own, with a bounded number of retries and growing backoff between them
If two devices disagree
The most recent change wins, and an appointment belonging to another account is never written into this one
View 3 — read of the period
Illustrative dataWhere the time went
Hours in meetings
17h30 this week
Concentration time
6h in protected blocks
Fragmentation
Longest free gap: 50 minutes
The read is computed from stated rules over your own calendar. It is a picture of the period — not a clinical diagnosis nor a performance review of anyone.
Screens built for this page, with invented data. No real calendar, person or company appears here.
What exists today, inside the product
Every item below is in operation. What is common in other calendars but does not exist here is not on this page.
Day, week and month with tasks
The task occupies a slot on the same grid as the appointment. No parallel list nobody opens.
A shield before saving
Conflicts, meeting limits, blocked ranges, working hours and lunch time are checked before saving: some block, others only warn.
Defended focus block
Concentration time takes real space and refuses double-booking, offering the next free slot instead.
Routines and recurrences
What repeats every week goes in once and keeps happening, without manual rescheduling.
Works offline
The change is saved on the device and resent when the network returns, with bounded retries and growing backoff.
Android, iOS and browser
Apps in both stores and browser access; reminders arrive in the browser and in the Android app.
Public booking link
A link for outsiders to book with you, with a database lock against double-booking the same slot.
Corporate mode
When you save an appointment with a CPF, a CNPJ or an external e-mail address in the title, note or address, Sync opens a warning so you can confirm or clean up the content.
Want to see how Sync fits your team’s routine?
Talk to a specialistFrom declared hours to an executed day
The highlighted step is where Sync says no on your behalf — that’s where deep-work time comes from.
Cycle of a day
Illustrative dataHours declared
Days, working window and time zone defined once — that’s what separates a free slot from an available one.
Appointments on the grid
Meetings arrive by being created in the calendar itself or through the public booking link.
Tasks with duration
The task gets a slot and starts taking space, instead of waiting for time to be left over.
Focus reserved
Concentration blocks are placed in the free windows identified from the declared hours.
Conflict declined
A request inside the protected block isn’t accepted by default: Sync returns the next possible slot.
Execution
Reminders arrive on the device; offline, the change waits in the queue and uploads later.
Read of the period
Meeting load, concentration time and fragmentation, computed from stated rules.
Seven-step flow: declared working hours, appointments on the grid, tasks with duration, focus block reserved, conflicting request declined with an alternative, execution with on-device reminders and read of the period.
Sync does not decide priorities on its own, does not cancel appointments by itself and does not decline invitations without offering an alternative. It defends what you marked as a priority — the choice remains yours.
A calendar is sensitive data — and it is treated as such
Who you meet, when and about what is strategic information. What the product does about it is described below, with no grand promise.
Nothing is lost when the network drops
Every change enters a local queue before uploading. A network or authentication failure does not discard the record: it stays in the queue until accepted.
Confidential stays masked on screen
An appointment marked confidential is masked on screen and only shows after unlocking with a PIN.
A warning when sensitive data is saved
In corporate mode, the check runs when an appointment is saved: a CPF, a CNPJ or an external e-mail address in the title, note or address triggers a warning, and the person chooses to confirm or clean it up.
The public link does not show your calendar
Whoever books from outside sees only free slots: the title, guests, location and notes of appointments never appear on the public page.
What this page does not promise: protection that removes the need for care, zero risk, sync that never fails, or compatibility with any calendar on the market. What exists is a queue that does not discard, a stated conflict rule, a warning when sensitive data is saved in corporate mode and a public link that shows only free slots.
A common calendar accepts; this one defends
The comparison isn’t with brands: it’s with the default behaviour of almost every calendar.
“Every calendar shows what you accepted. Few show what you gave up.”
Common calendar
Empty space is an open invitation. Tasks live outside the grid. Offline, you write on paper. Nobody measures the focus you lost.
Sync
The focus block takes real space and declines double-booking with an alternative. Tasks enter the grid. Offline, the queue holds and resends. At the end of the week, you can see the bill.
Automation tool
Moves data between systems, transforms records and triggers flows. Sync does not do that — and this page does not pretend otherwise.
Despite the name, Sync is not an integration hub: it has no connector for ERP, CRM or ad platforms, does no field mapping between systems and receives no third-party webhooks.
People with a full calendar and work that needs quiet
If your problem is a day spent entirely in meetings, this product was built for you.
Decision-makers who need time to think
Partners, directors or leads whose calendar is filled by other people and whose actual work requires long, uninterrupted blocks.
Teams producing against deadlines
People who write, design, analyse or build: the work does not advance in fifteen-minute gaps between meetings.
People working in the field
Client visits, sites, travel, places with no signal. The appointment is recorded on the spot and uploads when the connection returns.
Operations handling sensitive information
People dealing with contracts, negotiations or personal data who need confidential appointments masked on screen and a warning when saved content includes a CPF, a CNPJ or an external e-mail address.
Sync is included for Centriu clients
There is no Sync plan, no separate charge and no standalone purchase. It is a capability of the ecosystem, released with your organisation’s access.
No charge of its own
Sync has no plan, no subscription and no checkout. Centriu clients use it at no additional cost for this system.
Released with access
Access is granted by whoever administers the organisation, along with the other contracted systems — and can be revoked the same way.
No artificial limits
We do not create caps on appointments, tasks or devices to push a higher plan that does not exist.
If you want to check Centriu’s packages and paid systems, the pricing page has the full table. There is no price to show here because there is no charge to make.
Frequently asked questions
What is Centriu Sync?
It is Centriu’s calendar: appointments, tasks and concentration blocks on the same grid, with apps for Android and iOS, browser access and offline operation. The product is about protecting working time, not just recording meetings.
Is Sync a system integration tool?
No. Despite the name, it does not connect ERP, CRM or ad platforms, does no field mapping between systems, receives no webhooks and runs no corporate data sync flows. The word "sync" refers to syncing your own calendar across devices.
Which external systems does it connect to?
For holidays, Sync queries IBGE’s official register of municipalities, which identifies the city. Beyond that, we claim no integration with any other tool or calendar.
Does it work without internet?
Yes. Changes are still accepted and wait in a queue on the device. When the connection returns, the queue is resent on its own, with a bounded number of retries and growing backoff between them. A network failure does not discard the record.
What if I change the same calendar on two devices?
There is a rule to decide: the most recent change wins, with a guard preventing someone else’s calendar from overwriting yours.
How does the focus block work?
It takes a real slot on the grid, like a meeting. A request falling inside that slot is not accepted by default: Sync returns the next free time. The final decision remains yours — the system simply stops accepting automatically.
Is the weekly read a diagnosis?
No. It is a picture computed from stated rules over your own calendar: how much became meetings, how much stayed in concentration blocks and what the longest free gap was. It is not a medical assessment nor a measure of anyone’s performance.
Do my confidential notes go to the cloud?
Yes: the note is stored on the server, in a row visible only to your account. Marking the appointment confidential keeps it masked on screen until unlocked with a PIN.
What is corporate mode?
A set of protections for business use: when an appointment is saved, the content is checked and the system warns if there is a CPF, a CNPJ or an external e-mail address in the title, note or address, with the option to confirm or clean it up; and actions are recorded on the device.
Does Sync have a price?
No. It is included for Centriu clients, with no separate charge, no plan of its own and no standalone purchase. Access is granted by whoever administers the organisation, along with the contracted systems.
What is the difference between Sync and Run?
Run organizes the work to be done: projects, tasks, owners, deadlines and deliverables. Sync organizes the time in which that work happens: appointments, meetings and concentration blocks on the calendar. Run says what needs doing; Sync protects the hour to do it. They are separate systems and there is no automatic integration between them today.
See Sync against your real week.
We show how declared working hours, focus blocks and the offline queue behave on a day that looks like yours.