Profiles group your
projects together — put all your work projects in one profile and your private projects in another, so each stays out of the other’s way.
Time-tracking settings are always bound to a profile, not to an individual project, so everything in a profile shares the same rules:
Rounding, applied per entry or per day, to smooth tracked time to a clean interval.
A daily target time (say, 8 hours a day), tracked against your
time balance.
Special days — sick days, vacation (with an entitlement and a running tally of days taken), and holidays.
Automatic breaks, inserted once your tracked time for the day crosses a set limit.