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OneCal

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Sync multiple calendars in real-time, avoid double bookings, and manage all events in one place.

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TL;DR - OneCal

  • Syncs Google, Outlook, and iCloud calendars in real-time to prevent double bookings.
  • Offers privacy controls for event details shared during synchronization.
  • Provides a unified calendar view and easy-to-share scheduling links.
Pricing: Paid only
Best for: Enterprises & pros
4.7/5 across review platforms

What is OneCal?

Editorial review
OneCal is a calendar synchronization tool designed to prevent scheduling conflicts and simplify calendar management for individuals and teams. It seamlessly syncs events across Google Calendar, Microsoft Outlook, and Apple iCloud calendars in real-time, ensuring users are never double-booked. The platform offers privacy-focused syncing options, allowing users to control the level of detail shared between calendars, such as excluding event titles or specific information. Beyond syncing, OneCal provides a unified calendar interface to manage all connected calendars from a single view. Users can create, update, and delete meetings, RSVP to events, and join conference calls directly within the platform. It also facilitates easy scheduling by generating individual or team scheduling links, eliminating the need for back-and-forth communication. OneCal is ideal for professionals, teams, and anyone managing multiple personal and professional calendars who needs to maintain accurate availability and streamline their scheduling process. The product emphasizes strong data security and privacy, utilizing secure OAuth2 connections, requesting minimum necessary permissions, and encrypting data in transit and at rest. It does not store, analyze, or sell any calendar event data, making it a trustworthy solution for sensitive scheduling needs.

Available on: Web, iOS, Android

Pros & Cons

Pros

  • Prevents double bookings across multiple calendar providers effectively.
  • Offers granular control over privacy and shared event details.
  • Simplifies scheduling with easy-to-share links.
  • Provides a single, unified view for all calendars.
  • Strong commitment to data security and privacy (no data stored, analyzed, or sold).

Cons

  • No free tier, only a 14-day free trial.
  • Pricing is per user, which can add up for larger teams.
  • iCloud calendar updates can take up to 10 minutes to reflect.

Ratings Across the Web

4.7(28 reviews)

Ratings aggregated from independent review platforms. Learn more

Preview

Key Features

Real-time multi-way calendar syncing (Google, Outlook, iCloud)Privacy-focused sync with customizable event detail control (e.g., exclude titles, participants)Unified calendar interface for managing all connected calendarsIndividual and collective scheduling linksAbility to create, update, and delete meetings from unified viewRSVP to events and join conference calls directlyMobile-friendly user experienceSecure OAuth2 connections and minimum permission requests

Pricing Plans

Free Trial

Pricing checked Aug 2, 2026

Starter

$5/user/month

  • 2 Calendars
  • Unlimited Calendar Syncs
  • Unlimited One-on-one Scheduling Links
  • Unlimited Collective Scheduling Links
  • Scheduling Links Branding
  • Calendar View
  • Standard Support
  • User Provisioning API
  • Admin Managed Accounts
  • Remove OneCal Branding
  • User Onboarding Assistance

Essential

$10/user/month

  • 5 Calendars
  • Unlimited Calendar Syncs
  • Unlimited One-on-one Scheduling Links
  • Unlimited Collective Scheduling Links
  • Scheduling Links Branding
  • Calendar View
  • Standard Support
  • User Provisioning API
  • Admin Managed Accounts
  • Remove OneCal Branding
  • User Onboarding Assistance

Premium

$25/user/month

  • 50 Calendars
  • Unlimited Calendar Syncs
  • Unlimited One-on-one Scheduling Links
  • Unlimited Collective Scheduling Links
  • Scheduling Links Branding
  • Calendar View
  • Dedicated Support
  • User Provisioning API
  • Admin Managed Accounts
  • Remove OneCal Branding
  • User Onboarding Assistance

Reviews

4.7/5

Across 28 verified user reviews on g2

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OneCal FAQ

How does OneCal help prevent double bookings across different calendar services?

OneCal synchronizes events across Google Calendar, Microsoft Outlook, and Apple iCloud calendars in real-time. This ensures that your availability is consistently updated across all platforms, effectively preventing scheduling conflicts and double bookings.

Which teams would benefit most from using OneCal?

OneCal is ideal for professionals, teams, and anyone managing multiple personal and professional calendars. It helps maintain accurate availability and streamline the scheduling process, making it suitable for groups that frequently schedule meetings or manage complex calendars.

How does OneCal compare to Calendly for scheduling meetings?

While both OneCal and Calendly facilitate meeting scheduling, OneCal primarily focuses on real-time calendar synchronization across multiple providers to prevent double bookings. It also offers a unified calendar view and granular privacy controls for shared event details, which complements its scheduling link feature.

What kind of privacy controls does OneCal offer for synced events?

OneCal provides privacy-focused syncing options, allowing users to control the level of detail shared between calendars. Users can choose to exclude event titles or specific information, ensuring sensitive data remains private while still reflecting busy times.

Does OneCal include a free tier for users?

OneCal does not offer a permanently free tier; however, it provides a 14-day free trial for users to evaluate its features. After the trial, it transitions to a paid subscription model.

Can users manage all their connected calendars from a single interface in OneCal?

Yes, OneCal provides a unified calendar interface that allows users to manage all connected calendars from one view. Within this interface, users can create, update, and delete meetings, RSVP to events, and join conference calls directly.

What are the primary limitations of using OneCal?

OneCal does not offer a permanent free tier, only a 14-day free trial. Its pricing is also per user, which can increase costs for larger teams, and updates for iCloud calendars may take up to 10 minutes to reflect.

Source: onecal.io

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