Protect work booking calendars
Personal and family events can appear as busy time on the calendar coworkers use to book you.
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Sync your calendars and make open time easier to find.
Reflect work, personal, family, and shared events on the calendars people use to book you. Share busy-only availability, or copy titles and details when they are useful.
- Sync busy blocks across calendars
- Show open time to people booking you
- Copy details when needed
Sync preview
Preview what others will see before the rule runs
Choose the source calendar and the calendar people use to book you. Unclash shows how a real event becomes a busy block there, with titles and details hidden unless you choose to share them.
Use cases
Keep your calendars. Make availability visible where people book you.
Your existing calendars stay the source of truth. Unclash syncs only the availability others need to see, so booking calendars show the right busy time without exposing private event details.
Keep details out of shared calendars
People can see that a time is unavailable without seeing private titles, notes, locations, or attendees.
Reduce back-and-forth
When the synced calendar already shows the right busy blocks, others can pick a safe time without asking you to check every account.
How it works
Connect source calendars, sync busy blocks, let others book safer times
- 1
Connect calendars
Add the Google accounts and calendars that affect your availability.
- 2
Choose where booking happens
Pick the target calendar that coworkers, clients, or shared teams use to find time with you.
- 3
Sync busy blocks
Reflect source events as busy time on the target calendar while keeping original events in place.
- 4
Let people choose open time
Anyone who can view the synced calendar can avoid blocked time and pick a safer slot.
Why it matters
What changes when busy time is synced
People stop booking over hidden commitments
A personal appointment or family obligation can block time on the work calendar people actually use to schedule with you.
Work
Personal
Family
Real availabilityYour private context stays private
The synced calendar can show only busy time, so viewers know not to book there without seeing the original event details.
Original eventDesign reviewWork calendar
ProtectedBusyDetails hidden
Your own calendar stays the source of truth
Unclash mirrors availability into the right places while the original event remains on the calendar where it belongs.
ASuggested timesB
Finds open slots across calendars
AI assistants
Manage your schedule from ChatGPT and Claude
Unclash works as an MCP server. Connect it to ChatGPT or Claude, then ask for this week's schedule or tell it to book a meeting — the assistant works from the unified availability across every calendar you connected.
- What it can do
- List calendars and events, then create, update, and delete events. Works with Claude and with ChatGPT in developer mode.
- Your account only
- Connections use OAuth. You sign in to Unclash and approve access on a consent screen before the assistant can act.
- Real availability
- The assistant sees the same unified view you do, so suggested times respect every connected calendar.
- You stay in control
- Write actions are rate-limited and recorded, and you can disconnect anytime from the assistant's connector settings.
Sync the time people should not book
Mirror busy blocks from work, personal, family, and shared calendars to the calendars others check before booking you.
Let others find the open slots
People with access to the synced calendar can see when you are unavailable and choose a time that is actually open.
Share availability, not private details
Busy blocks can protect your time while private titles, notes, and context stay hidden unless you choose otherwise.
See the full picture yourself
Use the same view to confirm source events, synced blocks, conflicts, and the calendar that should receive the next event.
FAQ
Frequently asked questions about Unclash
Which calendars can I connect?
The public service currently supports Google Calendar, including multiple personal or Google Workspace accounts. You need permission to read the source calendar and edit the target calendar. Your organization's Google Workspace settings may restrict access. Outlook and iCloud are not currently available in the public service.
Can I try Pro without a card or an automatic charge?
Yes. New accounts start with a 14-day Pro trial, including up to 16 active sync rules and Pro's sharing options. No credit card is required. Unless you explicitly purchase Pro, the trial ends without a charge and your account moves to Free.
What is included in Free, and when do I need Pro?
Free costs $0 and includes up to 2 active sync rules that copy busy time without the original title, description, or location. Synced events include an Unclash attribution and follow the target calendar's sharing settings. Pro includes up to 16 active rules, copying selected event details, private visibility, and the option to hide the attribution. Choose Pro if you need more directions or more control over the copied events.
How much is Pro, and how is the annual plan billed?
Pro costs US$8 per month or US$72 per year. Both include the same features. Annual billing charges US$72 in one payment each year; US$6 per month is the monthly equivalent, not a monthly installment. Annual billing saves US$24 (25%) compared with 12 monthly payments. Paid plans renew automatically until canceled.
How are sync rules counted? Does two-way sync count as two?
One rule is one direction between two calendars: Work → Personal counts as 1 rule. Adding Personal → Work uses a second rule. Free's 2 active rules can cover that pair in both directions; Pro allows 16 active rules in total. Connected accounts, calendars you only view, and paused rules do not count toward this limit.
Can coworkers see the names of my personal appointments?
With Busy-only sync, the original title, description, and location are not copied to your work calendar. The target shows a busy block and, on Free, an Unclash attribution. On Pro, you can choose which details to copy. Anything you copy is saved on the target calendar, where its sharing permissions and your rule's visibility setting determine who can see it.
Will syncing change my original events or send invitations?
Sync rules read your source events and create, update, or remove their copies on the target calendar. They do not edit the originals or copy the guest list to send new invitations. Editing an original event yourself in Unclash, or through an AI assistant you connect, is a separate action that can change the original calendar.
Do I need to keep Unclash open for sync to work?
No. Sync runs in the background after you connect your accounts and create a rule. You can close the browser. Your calendar permissions must remain valid and the rule must stay active; check Settings and Sync logs if an account needs to be reconnected.