Time Interval Calculator

Time Interval Calculator (TimeDelta) is a stopwatch for nested intervals. Start a main interval — a workday, a training session, a meeting — then carve sub-intervals out of it: breaks, interruptions, phone calls. The app shows the total time, the time spent in sub-intervals and the net time, live. • Nested sub-intervals, started, closed or chained with one tap • Times adjustable to the second afterwards, even across midnight • A label on each interval • Results in hours:minutes:seconds and in decimal hours • History of saved sessions, which you can open and edit later • The current session is kept even if the app is closed • In English or French, following your device language No account, no ads, no tracking: everything stays on your device.