EGroupware
9.2#2 in calendar appsFrom €21.90 a monthFree planAndroidiOSWebAPI
Visit| Fact | EGroupware | Outlook Google Calendar Sync |
|---|---|---|
| Calendar sync | two_way | two_way |
| Free plan | Yes | Yes |
| Open source | Yes | The maker describes OGCS as open source and free, with no functionality restrictions as a project mission. |
| Shared calendars | Yes | Yes |
You want what its maker publishes above — check its page for the details.
You want what its maker publishes above — check its page for the details.