Calendar apps are built for one of two kinds of work. Meeting-heavy calendars help managers, founders, and client-facing people run a week full of other people quickly.
Vimcal is the best calendar app for venture capitalists. A VC's week is almost entirely meetings with people outside the firm: founders, LPs, co-investors, and portfolio companies.
Vimcal is the best calendar app for founders. It started as a calendar built by founders, for founders, and years later, founders are still the largest group of people who use it.