The most popular app to view all your calendars like Google, Live, Outlook, iCloud, Exchange, Office365, Yahoo, Nextcloud, Synology, GMX,, ownCloud and more. OneCalendar integrates all your calendars into an easy-to-read overview. View and manage all your appointments, events and birthdays.

OneCalendar is available on all platforms.

What’s New

Version 2.4.0

New week view

Ratings and Reviews

4.7 out of 5
5K Ratings

5K Ratings

Andresito R ,

Amazing to centralize calendars across devices

I use Microsoft Exchange for work, Google for personal life and follow other calendars (e.g. church, holidays). I heavily use my calendar for task management keeping them as all-day events that I constantly drag and drop to block time in my calendar to work on tasks, or to put them back as all-day events. I use iPhone, iPad and Windows 10. I’ve tried TONS of calendars to centralize all of them, such as Apple’s, Google’s, Calendars 5, Outlook’s, etc. None of those calendars managed drag and drop of events easily and the views were not good. One Calendar is GREAT. I have the free version for iPhone and iPad, and purchased premium for Windows 10.

jpgr56 ,

Clean, Uncluttered Design

I love this calendar app. I appreciate the simplicity and clarity of the display. So many other calendar apps are so complex, offering so many different options, that even the settings are hard to understand. The simplicity of the interface is intended by the developer. Just enough options to have the calendar look the way I want, but not so many options as to make it confusing. The developer is also quick to respond when I have made contact.

Plc1968 ,

Good app needs more features

I have used several different calendars. I really like this one, but don’t like that you can’t copy and paste an event. Would also like the ability to change the calendar that an event is attached to once it is created. I have multiple calendars set up for different people in my family so that I can keep track of their events in addition to my own. But if I accidentally create an event in my calendar and need to change to another calendar, I have to delete the event and recreate it. Overall, I like the look of the calendar and ability to customize the look as well.


Code Spark
80.4 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Catalan, Dutch, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Turkish

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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