Calendar is useless if it can't be synchronized with the exchange calendar or any mobile calendar
Agree pointless having a calendar unless it is available across all your devices, you need to know your appointments when you are on the go or than anything!!!
Even read only to other calendars would be very useful. Calendar has no notification or anything
Plus, the sharepoint app cant synchronize with the calendar which works fine on Web, but it's not on the app (sharepoint). Please this is URGENT!