Google calendar doesn't synchronizetion
I added URL in calendar and calendar showed all tasks' My, but when I changed tasks in todoist Tasks in the calendar didn't change
Unfortunately, this is Google's issue. The iCal feed we use updates instantly upon making changes and every other calendar software that support iCal would update any change you make on Todoist right-away, but unfortunately, Google have set up their servers to update iCal feeds just once a day.
We'll look into some alternative solutions of special calendar synchronization methods just for Google in the future.