How about using something like Google Tasks? https://support.google.com/calendar/answer/144246?hl=en https://support.google.com/calendar/answer/144246?hl=en Ju

How about using something like Google Tasks? https://support.google.com/calendar/answer/144246?hl=en https://support.google.com/calendar/answer/144246?hl=en Just create a group calender and away you go. https://support.google.com/a/answer/1626902?hl=en https://support.google.com/a/answer/1626902?hl=en This should also take away the need to sign up for a new service as its likely that everyone has a gmail/google account.