Work calendar
Needs the same protected availability.
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
Scheduling breaks when your calendars are scattered.
Work, personal, client, and family calendars often live in different accounts. One missed busy block can turn into rescheduling, apologies, and lost time.
Personal calendar
Needs the same protected availability.
Client calendar
Needs the same protected availability.
Family calendar
Needs the same protected availability.
Shared calendar
Needs the same 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.
1
Connect your calendars
Bring your calendar accounts into ParallelCals and choose the calendars you want protected.
2
Create sync rules
Choose one-way sync or mirrored availability, then decide where busy blocks should be created.
3
Busy blocks appear automatically
When an event changes in one calendar, ParallelCals updates the protected calendars for you.
4
Share a booking link when needed
Offer a link backed by your aggregated availability, without making booking the center of the workflow.
Features
Everything you need to stop manually blocking time.
Setup in minutes, fewer moving parts.
Automatic busy events
Create private busy blocks across target calendars whenever source events change.
Double-booking protection
Keep commitments from one account from being accidentally booked over in another account.
Multiple calendars, one availability
Combine work, personal, client, and shared calendars into one protected availability layer.
Provider synchronization
Connect Google Calendar, Outlook/Microsoft calendars, and iCloud Calendar in the same workspace.
Booking links included
Share links with custom questions, cancellation/rescheduling, and a bookings dashboard.
Calendar app controls
Create, edit, delete, RSVP, join meetings, and hide generated sync clones from your main view.
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 booking link
Availability calculated from protected calendars
Custom questions and booking management
Meeting creation with calendar invites
Cancel and reschedule links for invitees
Comparison
Made for protected availability, not bloated workflows.
Other scheduling tools can work well, but ParallelCals keeps the focus on one practical problem: making every calendar reflect the time you have already committed somewhere else.
| Capability | ParallelCals | Other scheduling tools |
|---|---|---|
| Primary focus | Protecting availability across calendars with automatic busy blocks | Usually centered on booking pages first |
| Multiple calendars | Built for Google, Outlook/Microsoft, iCloud, work, personal, client, and shared calendars | Often possible, but commonly tied to higher tiers |
| Synchronization | Events create private busy blocks in the other calendars you choose | Availability may be checked for booking, but calendars can remain visually fragmented |
| Booking links | Included with custom questions, cancellation/rescheduling links, and booking management | Usually the main product surface |
| Simple pricing | Free to try, then €3/month for 2 synced calendars and 1 active rule when calendars actually sync | Can get expensive as needs grow |
| No enterprise bloat | The core workflow stays direct and lightweight | May include features many users never need |
Pricing
Simple calendar-based pricing.
You can connect calendars and see how the setup works for free. Active syncing starts when two calendars are involved: €3/month for 2 synced calendars and 1 active rule, then +€3/month for each extra synced calendar or active rule slot.
Monthly plan
€3/month for 2 synced calendars and 1 active rule
Try the product first, then pay only when you turn on real sync between calendars.
A paid sync slot is the capacity that lets you keep one extra calendar or one extra rule actively syncing.
14-day trial
- Connect calendars and preview setup for free
- 14-day trial includes 2 synced calendars and 1 rule
- Active sync starts at €3/month for 2 synced calendars and 1 active rule
- +€3/month for each extra synced calendar or active rule slot
- Cancel any time; no partial-month refunds
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.