OneCal - Synchronize your calendars in real-time | Product Hunt

Sync your calendars,avoid conflicts

OneCal syncs your calendars in real-time, helps avoid meeting conflicts,
saves time, and keeps your personal life private.

Start for freeNo credit card required

Sync Google and Outlook, in 1 minute.

OneCal Demo thumbnail

Supported Calendar Providers

Google Calendar

Google Calendar

Learn More →
Outlook Calendar

Microsoft Outlook

Learn More →

Real time Calendar sync

After connecting your Calendars, you can create as many synchronizations as you like. OneCal will keep your calendars in sync, automatically, in real-time. Set up and forget.

Learn more

Privacy focused

OneCal offers a calendar synchronization configuration entirely focused on your privacy. It's up to you to decide how events show up in your calendars. Don't want to carry over the event titles? Cool, you can show as little or as much as information you like.

You can choose to sync:

Event titles
Event description
Event participants
Event location
Event conference data

Learn more


OneCal equips you with as much flexibility as possible. In order to keep your scheduling flexible, we've added options to synchronize the meetings based on your response. Don't want to synchronize meetings you haven't responded to yet? All good!

You can:

Mark cloned events as private
Assign custom colors to cloned events
Disable reminder notifications for clone events
Sync events marked as Free

Learn more

Privacy Focused

We value your privacy

Our mission is to help you reflect your real availability across multiple calendars, not sneaking into your personal data.

Secure Access to your Calendars

OneCal connects to Google using secure OAuth connections such that we never see or store users Google passwords. You can revoke the access at any time.

Minimum Permissions Required

OneCal only requests read and write access to your calendars for the purpose of synchronising your calendars. We won't jeopardize your calendars.

No data stored

We don't store any calendar event data. We don't analyze any event data. We don't sell or monetize any data.

users love onecal

Don't just take our word for it!

OneCal - Synchronize your calendars in real-time | Product Hunt

“Having multiple calendars has always been a pain. Missed invitations and unclear availability made managing schedules a nightmare. Thanks to OneCal, my team and I are always on the same page, and scheduling meetings is a breeze.”

Tommy Rowe testimonial image
Tommy Rowe
Head of Product Management, Feather

“Managing multiple calendars is frustrating. I've tried other calendar syncing solutions and many of them cause massive duplicates, have a horrible UX, or are way too expensive. OneCal is a perfect blend of everything making managing multiple calendars easy and cost-effective. I highly recommend it.”

Jeff Gibbard testimonial image
Jeff Gibbard
Author, Speaker

“Your UI is just so much better than the other platforms I've tried!”

“I have been using OneCal to manage my multiple calendars, and I must say I'm impressed. The UI is sleek and intuitive, making it easy to navigate and manage events across different calendars. The syncing is also very reliable, and I never had any issues with events missing or duplicated. When I did have questions, Onecal's customer support team was prompt and helpful. Overall, I highly recommend Onecal for anyone looking for a powerful yet user-friendly calendar management tool.”

Asim Bilal testimonial image
Asim Bilal
Senior Software Engineer

“OneCal is a great tool that's getting greater every day thanks to an exceptionally responsive and capable development team. The UX of this tool and its actual abilities are fantastic. As a consultant, I have multiple clients with calendars I need to sync. This tool does it better than any other I've seen!”

Max Wenneker testimonial image
Max Wenneker

“ I've just signed up and it's been what I've been looking for a while.”

“I've been using OneCal for a couple of months now, very easy to use, the synchronization process is fast and very intuitive. I would say the best product for synchronizing calendars that I've used so far. Great work guys 🙌”

Silvi Lila testimonial image
Silvi Lila
Senior Software Engineer

“ Far too often I've had to send the message: 'Sorry, I know my calendar looks open at that time but I actually have a conflict.'! This is going to take a lot of manual scheduling effort off my hands so I can stay focused on the real work!”

“You have such a beautiful and well-designed UI for an app I plan on setting and forgetting! lol”

“I love the tool so far and will happily be an evangelist for you all!”

Calendar Sync, Simplified

Seemlesly manage multiple calendars

We don't ask that you change how you work. We only aim to make it simpler. OneCal provides all the tools to make working with multiple calendars a breeze.

Real-Time Updates

Your calendars are automatically updated in real-time as the original events change or new events are added.

Multi-Way Syncs

Choose from one-way or multi-way syncs between 2 or more calendars. Set up once and forget.

Team Plans

We offer team plans for your whole organisation to start using OneCal and sync their calendars.

Fully Configurable

OneCal provides all the necessary tools to easily configure exactly what you want to sync over. No more, no less.

Privacy Focused

We only store the data we absolutely need to perform the sync. No data about your events is stored in our systems.

Simple Interface

No need for extensive doc pages. Everything is clearly explained and good defaults are provided out of the box.

Frequently asked questions

Ready to sync your Calendars?

Reflecting your availability across multiple calendars is tedious and time-consuming. OneCal was created with a mission to give peace of mind to calendar users.