01
Connect your calendars
Bring your calendar accounts into ParallelCals and choose the calendars you want protected.
Availability protection for people with more than one calendar
Protect your availability across every calendar.
ParallelCals keeps your calendars synchronized with automatic busy blocks, plus one booking link when you need to share your availability.
Google, Outlook, and iCloudAutomatic busy blocksBooking links included
Protected availability
One event. All calendars protected.
Calendar A
Client call
10:00-11:00
Work
10:00-11:00Busy
Personal
10:00-11:00Busy
Client
10:00-11:00Busy
Booking link
09:3014:0016:30
Booked once
The meeting lands on the target calendar and protection keeps propagating.
The problem
Scattered calendars create invisible conflicts.
Work, personal, client, and family calendars often live in different accounts. One missed busy block can turn into rescheduling, apologies, and lost time.
WorkPersonalClientFamilySharedOne protected availability.
How it works
One event. All calendars protected.
ParallelCals is built around automatic busy-block synchronization. Booking links are there when you need them, but protected availability is the core workflow.
02
Create sync rules
Choose one-way sync or mirrored availability, then decide where busy blocks should be created.
03
Busy blocks appear automatically
When an event changes in one calendar, ParallelCals updates the protected calendars for you.
04
Share a booking link when needed
Offer a link backed by your aggregated availability.
Features
Everything you need to stop manually blocking time.
Setup in minutes, fewer moving parts.
Automatic private busy blocks
Create private busy blocks across target calendars so commitments are not accidentally booked over.
One unified calendar view
See availability across work, personal, client, and shared calendars in one place.
Provider synchronization
Connect Google Calendar, Outlook/Microsoft calendars, and iCloud Calendar in the same workspace.
Private by default
Keep busy blockers detail-free, or opt into limited title, location, and meeting-link context per rule.
Booking links
Share a booking link backed by all your calendars.
When someone needs to book with you, ParallelCals can expose one clean link. The slots are calculated from your protected availability, then the created meeting joins the same sync system.
One public link, backed by the calendars you choose
Available slots reflect your protected availability
Questions, invites, cancellation, and rescheduling are included
Pricing
Pick the calendars you need. Nothing else.
Connect calendars and preview ParallelCals for free. When you are ready to protect real availability, choose a simple monthly calendar plan.
Starter
€3/month
Up to 2 calendars with private availability sync included.
- Private Busy and Out-of-Office blocks
- Google, Outlook, and iCloud
Plus
€5/month
Up to 4 calendars with private availability sync included.
- Private Busy and Out-of-Office blocks
- Google, Outlook, and iCloud
Pro
€7/month
Up to 6 calendars with private availability sync included.
- Private Busy and Out-of-Office blocks
- Google, Outlook, and iCloud
Power
€9/month
Up to 8 calendars with private availability sync included.
- Private Busy and Out-of-Office blocks
- Google, Outlook, and iCloud
One 14-day Starter trial for first-time subscribers. A payment method is required to activate it. Cancel before renewal and pay nothing.
FAQ
Straight answers before you sign up.
Is ParallelCals mainly a booking tool?
No. The core product is availability protection: automatic busy blocks across calendars. Booking links are included when you want to let someone schedule with you.
Can I connect multiple calendar accounts?
Yes. ParallelCals is built for people who manage several accounts or calendars and need availability protected across all of them.
Does it prevent double bookings?
That is the core goal. Events from one calendar create busy blocks in the other calendars you choose, and booking links only show slots backed by your aggregated availability.
What happens when an event changes?
ParallelCals detects changes through provider notifications and scheduled reconciliation. Created, updated, and deleted source events are reflected in the protected target calendars.
Is it for teams or individuals?
It is built first for freelancers, consultants, agencies, and busy professionals. Small teams can use it when they need a simpler availability-sync setup.
What calendars do you support?
ParallelCals supports Google Calendar, Outlook/Microsoft calendars, and iCloud Calendar. iCloud connects with an Apple app-specific password through CalDAV, so it does not create native Google Meet or Microsoft Teams meetings.
Can target calendars show more than just Busy?
Yes, if you enable advanced sync for a rule. By default generated blockers stay private and detail-free; advanced sync can copy limited title, location, and meeting-link context.
Is there a free plan?
Yes. You can sign up, connect calendars, and inspect the setup without paying. Active syncing needs at least two calendars; the 14-day trial includes 2 synced calendars and 1 active rule.
Never manually block time again.
Keep every calendar protected with automatic busy blocks, then share a booking link only when you need one.