One Calendar

One Calendar is a lightweight visual calendar app for Windows 10 and Windows 11 PCs, enabling users of all knowledge levels to unify all their digital calendars into a single application where they can take advantage of the clear overview of all imported data points!

Enjoy an eye-catching visual design, quickly switch between available display modes (daily, weekly, monthly and yearly views), personalize the look of the app, and accelerate daily workflow with fast and reliable calendar overview tools optimized for both desktop and touchscreen use.

Originally created in 2014 by the development team at Code Spark, One Calendar has managed to dramatically expand its functionality and become one of the most downloaded calendar applications on the Microsoft Store.

Today, One Calendar has built-in support for live synchronization with an incredible variety of cloud-powered calendar services, including Windows Live, Hotmail, Google Calendar, Facebook, iCloud, Office 365, Outlook.com, and Exchange, making it a perfect choice for users who want to unify all those calendar services into one highly streamlined platform where all their scheduled events will be clearly marked and easy to notice.

The app features a wide array of added features in addition to simple event listings. It can be accessed when the user’s PC is fully offline and without an active internet connection, and even supports a drag & drop interface that can speed up daily productivity when managing a large number of calendar entries.

A streamlined user interface with built-in theme support can enable users to set up their calendar overview in colors that best fit their needs, which is especially useful for users with vision issues.

The powerful search tool enables users to quickly identify any type of event – from birthdays, scheduler work tasks, and even Facebook Events.

All data handled by One Calendar is kept secure and inaccessible by unauthorized users with comprehensive local encryption.

How to Use

• Open the App – Launch the application from the Start menu or desktop shortcut.
• Add Accounts – Connect your Google, Outlook, Exchange, iCloud, or other calendar services.
• Customize Views – Choose between day, week, month, or year views for better scheduling.
• Create Events – Click on a date or the “+” icon to add new events with details.
• Set Reminders – Enable notifications to receive alerts for upcoming events.
• Sync Across Devices – Ensure your calendar stays updated across multiple devices.
• Use Color Coding – Categorize events with different colors for better organization.
• Search & Filter – Quickly find specific events using the search function.
• Adjust Settings – Customize themes, time zones, and notification preferences.

PROS

• Supports multiple calendars
• Customizable interface
• Calendar sharing options
• Reminders and notifications
• Multi-device synchronization

CONS

• Limited customization options
• No task management functionality

Conclusion

One Calendar is a comprehensive calendar utility that can easily unify a wide variety of cloud-powered calendar accounts, and keep all entries synced and easily accessible within one easy-to-use app.


One Calendar is FREE and can be quickly downloaded and deployed on all modern Windows 10 and Windows 11 PC by visiting its official Microsoft Store page.