What's you fav scheduling apps?

Calendly

Have only used Calendly from the ones on the list. But I'm a huge fan of Vimcal. It syncs all calendars, runs super fast with shortcuts, easy to build custom availability.

I think Calendly because that was the first scheduling app I was introduced to in 2018 and I kind of stuck to it without the need for finding other solutions as it perfectly suits my needs. This is clearly a situation where a user doesn't want to shift to another solution as there's no apparent burning need. Plus Calendly enjoys a first mover's advantage :) I haven't even graduated to the paid version!