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On the recordRead 12 Oct 202615 facts
OneCalendar
OneCalendar · Heemskerk, Netherlands
Plans and prices
Basic
Free
Synchronizes up to 6 months of appointment history
Read 12 Oct 2026 · onecalendar.nl
Premium
Priced on request
License required separately for Android, iOS, and Windows; valid on devices using the same platform and store account
Read 12 Oct 2026 · onecalendar.nl
On the record
- Appointment tools
- Users can add, update, and delete appointments, set recurrences, invite people, accept invitations, and search appointments.onecalendar.nl · read 12 Oct 2026
- Calendar services
- It supports Google Calendar, Outlook, Office 365, Exchange, iCloud, CalDAV, Yahoo, GMX, Synology, Nextcloud, ownCloud, and Mailbox.org.onecalendar.nl · read 12 Oct 2026
- Calendar views
- Available views include day, week, month, year, and list or agenda.onecalendar.nl · read 12 Oct 2026
- Customization
- Features include calendar and appointment colors, configurable widgets, and theming with 170 color options, background pictures, text colors, and a dark theme.onecalendar.nl · read 12 Oct 2026
- Mobile apps
- ios and androidonecalendar.nl · read 21 Sep 2026
- Offline use
- The app can view and manage appointments without an internet connection.onecalendar.nl · read 12 Oct 2026
- Premium features
- Premium adds appointment colors, theming, search, configurable widgets, immediate synchronization, navigation, and up to three years of appointment history instead of the usual six months.onecalendar.nl · read 12 Oct 2026
- Premium limits
- Printing, automatic day rollover, and hiding promotional windows are listed as Windows 10/11-only Premium features.onecalendar.nl · read 12 Oct 2026
- Privacy
- The privacy policy says appointment and birthday information is not stored on OneCalendar servers and synchronization happens directly between the device and calendar provider.onecalendar.nl · read 12 Oct 2026
- Purpose
- OneCalendar lets users manage appointments, set up recurring events and meetings, and share appointments.onecalendar.nl · read 12 Oct 2026
- Security
- For Google and Microsoft accounts, OneCalendar uses OAuth 2.0 over HTTPS and stores received tokens encrypted on the device; its security page also says iCloud passwords and Exchange credentials are stored encrypted on the device.onecalendar.nl · read 12 Oct 2026
- Support
- The support page provides separate email addresses for Windows, Android, iOS, and macOS users, plus a general support address.onecalendar.nl · read 12 Oct 2026
