Sync your calendars, avoid scheduling conflicts
OneCal syncs Outlook, iCloud, and Google Calendars in real-time so you don’t get double-booked, lets you share easy-to-use scheduling links, and helps you manage all your calendars in a unified calendar interface.
Supported Calendar Providers
You are in good company. OneCal is trusted by thousands of users from organizations like
Sync Multiple Calendars & Simplify Bookings
Easily sync multiple calendars and reduce double bookings. Set up individual or team scheduling links to facilitate easy appointments and meetings.
Calendar Syncing
Privacy-focused Calendar sync
OneCal provides a privacy-centric Outlook, iCloud and Google Calendar sync setup that allows customizing how events are replicated across your calendars. Whether you prefer excluding the event titles or displaying specific information, OneCal gives you complete control over the level of detail shown.
Multi-way Calendar Sync Direction
Sync multiple calendars in real-time, effortlessly
With OneCal, you can synchronize multiple Outlook, iCloud and Google Calendars in one go. Just select the calendars you want to keep in sync, and OneCal will keep them in sync in real-time.
Scheduling Links
Share Individual or Collective Scheduling Links
Effortlessly share scheduling links for others to schedule time with you or your team. Say goodbye to tedious back-and-forth communication and confusion.
Calendar View
Manage all Your Calendars in a Single Calendar Interface
Manage Outlook, iCloud Calendar, and Google Calendar from a single, unified calendar interface. Create, update, and delete meetings, join conference calls, RSVP to events, and more - all through a mobile-friendly, intuitive experience.
Committed to Privacy & Security
We are committed to providing the best data security and privacy that you and your company can trust. We only request the necessary scopes to perform the services you choose and never sell, store, or analyze any data.
Compliance in progress
No data stored, analyzed or sold
We don't store any calendar event data. We don't analyze any event data. We don't sell or monetize any data.
Secure Access to your Calendars
OneCal connects to your calendars using secure OAuth2 connections such that we never see or store 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 don't have access to your files, event attachments, email, or any non-calendar features.
Data encrypted in transit and at rest
The data that we store to perform the app's functionality is encrypted in transit and at rest. Everything runs on AWS inside a private VPC, so it isn't open to the public internet.
Secure and Scalable Infrastructure
OneCal is hosted on AWS, the leading cloud infrastructure provider, and leverages all of AWS's security, privacy, and redundancy features. Our infrastructure is extremely scalable, leaving no room for downtime.
Protected from Attacks
Our application has a web application firewall, we've setup several Distributed Denial of Service (DDoS) Protections, and we do regular vulnerability scanning to make sure the platform stays secure.
"OneCal is the only way I found to consistently sync my work (Outlook) and personal (Google) calendars. I tried all the suggested free methods and none were successful. I rely on both calendars and am so pleased I can see them together everywhere I look!"
"I primarily utilize OneCal to keep multiple calendars synced so that different organizations can see my shared schedule. This one tool helps me manage tons of calendars effectively and my coworkers, clients, and companies can all keep track of my schedule in real-time."
"The ability to sync multiple calendars so I can stay on top of my life is really important to me. It made it much easier than other products I tried."
"I really appreciate how OneCal solves my need to have all of my calendars synced, so I'm not double booking time on my calendar. It's super easy to set up, and I found the user interface very nice to work with. Once I signed up, I had everything syncing in just a few minutes."
"OneCal solved ALL calendar issues!
I have 5 different gmail calendars and OneCal is like, 'Not a problem!'
I need multiple booking links - OneCal - 'Not a problem.'
I had an issue (user issue for sure) and A REAL PERSON from OneCal is emailing me with a solution before the end of day.
You simply cannot beat this tool or their amazing support. "
"This has been a true life-saver to have updates syncing in real-time and eliminates the need for a third-party calendar sharing view for me. Was a breeze to set up as well. Thank you for inventing this!"
"The clean layout and constantly evolving features make it really easy to navigate and great value. It has good integrations with other websites and really quick to load as well. It's made my ROI really high and works great."
"I use OneCal for syncing between three different calendars - day job, my own business, and personal calendar. It solves the big problem of not double booking across different parts of my life. I also appreciate not having to manually cross-check calendars while maintaining privacy on my day job calendar."
"During my search for a meeting scheduling solution, I discovered OneCal. I realized that it could effortlessly address all my calendar-related issues. The setup process was incredibly intuitive, and I can't think of a single drawback to this solution. I had it up and running in just three minutes. "
"It's a once-and-done setup, a few minutes to add and sync the calendars and then you never need to touch it again. And reasonable permissions manifest as well. OneCal has been head and shoulders above any other interaction I've seen, with responsive devs eager to explain their design and even implement new features."
"I love OneCal for its ability to remove the chaos of scheduling across different time zones and schedules. I appreciate how it organizes both my personal and professional life, preventing me from missing important events like my kid's preschool graduation. The ease of use has significantly reduced my stress."
"I like that OneCal solves the problem of double bookings for me as a freelancer with multiple email accounts. It books meetings across all my calendars automatically, which is a major benefit. I use OneCal daily and appreciate how easy it is to set up and not have to look back."
"OneCal is the best service I have found for calendar synchronization and management. I synchronize seven calendars using a combination of Google Workspace and Office 365 calendars, and OneCal keeps everything in sync. It offers me an easy way to manage my busy schedule across seven engagements. The game changer is OneCal's customized booking links, each customized with a unique logo. I have tried other services, and while they work well, none work as quickly and cleanly as OneCal."
"I really like OneCal for its seamless experience and the fact it just works. I appreciate how it allows multi-to-multi calendar synchronization, making it possible to synchronize my work, private, and business calendars effectively. After trying multiple calendar tools, OneCal is the first one that actually works for me."
"Super easy to use, FANTASTIC support, pretty easy to integrate and implement. Use it daily. The calendar sync function alone is worth the price and the UI is excellent."
Seamlessly Synchronize Multiple Calendars
OneCal is the go-to tool to manage multiple calendars. We’ve got you covered from Outlook, iCloud and Google Calendar synchronization to scheduling links!
Real-Time Updates
Your calendars are automatically updated in real-time as the original events change or new events are added.
Multi-Way Calendar 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.
Scheduling Links
You can easily create and share individual or collective scheduling links in minutes.
Fully Configurable
OneCal provides all the necessary tools to easily configure exactly what you want to sync between your calendars. No more, no less.
Privacy Focused
We only store the data we absolutely need to perform the calendar synchronization. No data about your calendar events is stored in our systems.
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.