NewNear real-time sync with Boost
Connect your calendars. Keep them in sync.
CaliSync copies your events — or just your busy time — between Google, Outlook, iCloud and more, so you never get double-booked again.
- Free forever plan
- No card needed
- Set up in about 3 minutes
Works with
- Outlook & Microsoft 365
- iCloud
- Zoho
- Protonsoon
- Any ICS link
The problem
Your calendars don’t talk to each other. So people book you when you’re busy — at the dentist, on the school run, in another client’s meeting.
Set up in three steps
≈ 3 minutes, start to finish- 01~1 min
Connect your calendars
Sign in with Google, Microsoft or Apple. We only see the calendars you pick.
- 02~1 minEvery 5 minutes, copy events from Personal to Work as Busy blocks.
Choose what to share
One way or both ways. Full details, just titles, or simply “Busy”.
- 03foreverIn syncLast sync 2 min ago · next 10:15
Relax — we keep them in sync
New, moved and cancelled events update automatically. We’ll tell you if anything needs you.
Everything calendar sync should do — and nothing it shouldn’t
Privacy
Share your time, not your details
Copy events as “Busy”, titles only, or full details — per rule. Private events always stay private.
Two-way
Busy here means busy everywhere
Keep two calendars in sync both ways. Copies are tagged, so nothing ever bounces back.
Changes
Repeats, reschedules and cancellations — handled
Recurring series, one-off changes and deletions all follow through. Big deletions pause and ask first.
Time zones
Every time zone, correctly
Times stay exact across zones and clock changes. All-day events stay all-day.
Sync health
Know it’s working, always
Clear status for every rule. If something needs you, one email and a one-click fix.
Boost
Near real-time when it matters
Add Boost to a calendar and changes sync within about a minute, where your provider allows it.
How sync works
One way, or both ways. Your call.
Events in Personal appear in Work as busy blocks. Nothing from Work comes back — perfect for keeping home life private.
Personal
- Dentist · 14:00
- School run · 15:15
Work
- Client call · 10:00
- Busy · 14:00
- Busy · 15:15
Simple pricing. Start free.
One sync rule free forever. Upgrade when you need more.
Pro
14-day free trial£4.99 / month
As many sync rules as you need, checked every 5 minutes.
Try Pro free+ Boost
£0.99 / calendar
Add to any Pro calendar for near real-time sync, where your provider allows it.
Prices include VAT. Cancel any time in two clicks.
Only the calendars you choose
You sign in on Google’s or Microsoft’s own page. We never see your password, email, contacts or files.
Encrypted and hosted in the UK/EU
Everything is encrypted in transit and at rest. We never sell or share your data.
Leave whenever you like
Disconnect in one click. We remove our copies and delete your data within 30 days.
Questions
Yes. The Free plan includes one sync rule — one-way or two-way — checked every hour, for as long as you like. No card needed.
No. Every copy CaliSync makes is tagged, so we always know which events are copies and never copy them back or twice.
Yes. Each sync rule can copy full details, titles only, or just “Busy”. Busy-only is the default, and private events always show as Busy.
Its copy is removed too. If lots of events disappear at once, we pause and ask before removing copies — just in case.
Google Calendar, Outlook and Microsoft 365, Apple iCloud, Zoho, and any calendar you can subscribe to with an ICS link. Proton is coming soon.
We only access the calendars you choose, encrypt everything, host in the UK/EU, and never sell your data. Disconnect any time and we delete it within 30 days.
Your first sync takes about 3 minutes.
Free forever for one sync rule. No card needed.