You asked what type of work I do that requires daily chrono. use. I'm a forensic psychiatrist. I consult to lawyers, review records by the box, examine criminals or others involved in law suits, write reports, testify in court, teach businesses and educational institutions how to prevent violence, and help clients stay safe when they are threatened or stalked. All of this is billed by the hour, so keeping accurate time records is important. Often there are many cases going on in the same day, requiring stopping the chrono, recording elapsed time, and restarting. At other times, a project will run for up to ten or twelve hours, so having an hour totalizer is important, too.
These uses rule out 30-minute chronos and mono-pusher chronos. I've looked at literally every 12-hour mechanical chrono ever made and have owned 30-40 different models, concluding that the three best for my uses are the VC Overseas Chronograph, the AP Royal Oak Chronograph, and the AP Royal Oak Offshore Chronograph. Thus, these are what I collect and what I use.
Incidentally, if you have a lawyer, accountant, or other professional who bills by the hour and doesn't wear a chrono., you might ask yourself or them how they are measuring and recording time spent on your case. It's much easier to "round up" if one estimates than if one measures.