Google Calendar Sync is described as 'Allows you to sync events between Google Calendar and Microsoft Outlook Calendar. Youll be able to determine the direction of information flow, as well as the sync frequency. Staying on top of your Google Calendar and Microsoft Outlook Calendar events has' and is an app in the backup & sync category. There are six alternatives to Google Calendar Sync for a variety of platforms, including Windows, Android, iPhone, Blackberry and iPad apps. The best Google Calendar Sync alternative is Calendar Sync +, which is both free and Open Source. Other great apps like Google Calendar Sync are onemediahub, Outlook4Gmail, OggSync and VCOrganizer.