Sync Rules
Privacy-first sync rules
Choose exactly what gets mirrored between calendars. Keep full titles, partial details, or simple Busy placeholders by default.
Double-booked because your calendars do not sync
Eliminate overlap across every calendar.
One booking blocks time everywhere.
iambusy fixes broken calendar sync by connecting any calendar via iCal, then instantly propagating busy time so the same slot cannot be booked twice. No vendor lock-in, no OAuth app installs — it works with every calendar app, even when your organization blocks third-party integrations.
7-day free trial · Setup in 2 minutes
9:00
Team standup
10:00
Client review
11:00
Busy
12:00
Lunch with Alex
1:00
Busy
Synced
Universal Compatibility
Works with any calendar that supports iCal
iCal is the universal standard supported by virtually every calendar app. No OAuth app installs needed — just paste your calendar's iCal URL and you're syncing, even in locked-down Microsoft 365 or Google Workspace environments.
Work Calendars
Personal Calendars
Team Calendars
Any iCal Calendar
Features
Everything you need to end scheduling chaos
Mirror availability, protect sensitive details, and eliminate the back-and-forth.
Multi-way
Flexible sync direction
Run one-way syncs for clean separation, or multi-way syncs to keep every account aligned in near real-time.
Booking
Booking links that check availability
Share personal or team booking pages. iambusy checks all connected calendars to prevent double-bookings before they happen.
Dashboard
Unified timeline view
See, update, and manage work and personal schedules from one place instead of bouncing between tabs all day.
How it works
Set up in three simple steps
1
Connect your calendars
Paste any iCal URL from your calendar app. Works with every major calendar — no OAuth app install or admin approval needed, setup takes seconds.
2
Set your sync rules
Choose what to share between each calendar pair — full details, titles only, or just Busy blocks.
3
Stay in sync automatically
Changes propagate in seconds. No manual work, no double-bookings, no missed meetings.
Booking Pages
Share a booking link.
Let calendars do the rest.
Create a personal or team booking page in seconds. Pick which calendar new meetings land on, and iambusy checks all your connected calendars before showing available slots — so you never get double-booked.
- Choose which calendar receives bookings
- Availability checked across all connected accounts
- Buffer time, min notice, and daily limits built in
- Automatic confirmation emails to both parties
SK
Sarah Kim
30-min Strategy Call
30 min
Video Call
Books on: Work Calendar
March 2026
MoTuWeThFr
2 3 4 5 6 9 10 11 12 13 16 17 18 19 20
Mon, Mar 9
9:00 AM
10:30 AM
1:00 PM
2:30 PM
4:00 PM
Powered by iambusy
Security
Built with privacy at the core
We keep data access narrow and practical. Enough to sync reliably — nothing more.
No passwords required
Connect via iCal URLs — we never ask for or store your calendar passwords.
Read-only access
iCal feeds are read-only by design. We see your availability — nothing more.
Encrypted in transit
All event metadata is minimized by design and encrypted between services.
Busy blockers
Hide sensitive event details entirely. Contacts only see that you're unavailable.
Pricing
Simple, transparent pricing
One plan. Everything included. No hidden fees.
Less than the price of a coffee to avoid double bookings forever.
Yearly plan shown as monthly equivalent for easier comparison.
Pro 2 months free
$ 4.17 /month
When paid yearly ($50/year)
Save 17% compared to monthly billing
- Unlimited calendar connections
- Multi-way sync across all calendars
- Booking pages with availability check
- Privacy controls & Busy-only sync
- Near real-time webhook sync
- Automatic confirmation emails
No credit card required to start
Compare
See how iambusy stacks up
One plan, everything included, no surprises.
| iambusy | Calendly | OneCal | |
|---|---|---|---|
| Starting price | $5/mo | $10/mo | $6/mo |
| Calendars | Unlimited | Limited | 2 – 50 |
| Calendar sync | |||
| Booking pages | |||
| No branding | Included | — | $30/mo plan |
| No OAuth / admin approval | |||
| Simple pricing | One plan | 3 tiers | 3 tiers |
FAQ
Common questions
Everything you need to know about iambusy.
Which calendars are supported?
Any calendar that supports iCal feeds — which includes Google Calendar, Outlook, Apple Calendar, Yahoo Calendar, Proton Calendar, Zoho Calendar, Nextcloud, Fastmail, Thunderbird, and virtually every other calendar app. Just paste your calendar's iCal URL and you're syncing in seconds.
How quickly are changes synchronized?
Most updates sync within seconds through webhooks and smart polling, depending on provider limits. This is significantly faster than native iCal subscription refresh rates, which can take 12–24 hours.
Can I sync calendars from different organizations?
Yes. Because iambusy uses iCal feeds instead of OAuth app installs, it works across separate workspaces, Microsoft 365 tenants, Google Workspace domains, and personal accounts — even when admins block third-party calendar apps. No IT approval or admin access required.
Will event details always be copied?
No. You choose what to share. Use Busy-only blockers to hide details, title-only mode for partial visibility, or full sync for complete event information. Privacy settings can be configured per sync pair.
How does iambusy prevent double bookings?
When an event is created in any connected calendar, iambusy instantly propagates a busy block to all your other calendars. This means the same time slot can't be booked in two places — even across different calendar providers like Google and Outlook.
Can I sync my work Outlook calendar with my personal Google Calendar?
Yes — this is one of the most common use cases. iambusy connects your Outlook and Google calendars via their iCal feeds, syncing busy time in seconds. Use Busy-only mode to keep work details private.
Is iambusy a Calendly alternative?
iambusy includes booking pages like Calendly, but also syncs your calendars together — something Calendly doesn't do. This means your booking page checks all your connected calendars for availability, not just one account.
Do I need to share my calendar password?
No. iambusy uses iCal feed URLs, which are read-only by design. Your calendar credentials are never shared, stored, or requested.
How much does iambusy cost?
iambusy is $5/month or $50/year (saving 2 months). Every plan includes unlimited calendar connections, booking pages, multi-way sync, and privacy controls. There's a 7-day free trial with no credit card required.
Can I sync more than two calendars?
Yes. iambusy supports unlimited calendar connections. You can sync your personal Google Calendar, work Outlook, client calendars, team calendars, and any other iCal-compatible calendar — all at once.
Guides
How to sync your calendars
Step-by-step guides for syncing every calendar combination. Pick yours and get set up in minutes.
Sync Google Calendar with Outlook Keep Google Workspace and Microsoft 365 aligned automatically. Sync Google Calendar with Apple Calendar Bridge Google and iCloud calendars across all your devices. Sync Outlook with Apple Calendar Connect Microsoft 365 and iCloud without manual copying. Sync work and personal calendars Stop work meetings from overlapping with personal commitments. Avoid double booking between calendars The definitive guide to eliminating scheduling conflicts. Calendly alternative with real calendar sync Booking pages that actually check all your calendars. Sync Google Calendar with Proton Calendar Keep privacy-first Proton and Google calendars in sync. Sync multiple Google Calendar accounts Unify personal, work, and freelance Google accounts. Sync work Outlook with personal Google The most common calendar conflict, solved in 2 minutes.
Ready to eliminate calendar conflicts?
Connect your calendars once and let iambusy keep your availability accurate — automatically, everywhere.