I’m a naturally unorganized person, and sunrise was honestly the only calendar/task tracker that has ever kept me organized. I loved it and really used it, but it was bought by Microsoft and shutdown.
They integrated some parts into outlook, but outlook is used for work and I don’t like to get my work schedule and personal schedule mixed up. Sunrise just worked and I really haven’t found something that’s helped since. I’ve paid for some other calendar apps and they just aren’t the same. RIP