Keeping your schedule organized can be a challenge when you’re juggling multiple calendars from different providers. One Calendar simplifies your life by consolidating all your calendars—whether it's Google, Outlook, iCloud, Exchange, Office365, Yahoo, or even niche services like Nextcloud and ownCloud—into a single, streamlined interface. Designed for Android, iOS, macOS, and Windows, OneCalendar ensures that your events and appointments are accessible and manageable wherever you are.
This all-in-one calendar app is perfect for anyone who wants to boost productivity, streamline time management, and avoid the stress of missed events or double bookings.
All-In-One Calendar Integration
OneCalendar supports a wide range of calendar services including Google, Outlook, Exchange, iCloud, Office365, Yahoo, GMX, Synology, Nextcloud, and more. Instead of switching between apps, view all your appointments, events, and birthdays in one intuitive interface.
Multiple Viewing Modes
Choose from day, week, month, year, or agenda/list views to suit how you like to visualize your schedule. Every view includes week numbers for enhanced planning precision.
Appointment Management Made Easy
You can add, update, or delete appointments directly in the app. Set recurring events, invite others to meetings, and manage incoming invitations seamlessly.
Offline Access
No internet? No problem. OneCalendar allows full access to your calendar data offline, so you can view or make changes anytime, anywhere.
Customizable Filters and Colors
Use color-coded calendars and appointments to easily identify what’s most important. Filter calendar views quickly to focus on specific categories or schedules.
Search and Share Functions
Find past or upcoming events instantly with a powerful search tool. Share appointments with friends or colleagues using your favorite messaging apps like WhatsApp.
Widgets & Theming Options
OneCalendar supports customizable widgets (including Live Tiles on Windows) for quick glance access. Choose from 170+ colors, use background pictures, select custom text colors, and switch to dark mode for a personalized experience.
Multi-Language Support
The app is available in multiple languages including English, German, French, Spanish, Dutch, Chinese, Korean, Japanese, and Hindi, making it accessible to a global user base.
Why OneCalendar?
OneCalendar isn't just about consolidating calendars—it's about creating a clear and personalized scheduling experience. Whether you're a busy professional managing work-life balance or a student keeping up with classes and exams, OneCalendar is built to adapt to your needs.
Its seamless cross-platform compatibility ensures you always have access to your schedule—on your phone, tablet, or desktop. And because it works offline and supports cloud-based backup, your data stays safe and accessible at all times.
Version History
v6.5.0—22 Aug, 2025
16KB page support
v6.4.2—8 Aug, 2025
Added task time support
v6.3.1—1 Aug, 2025
Improved translations
