Chrono — Precision Timer

Chrono is a simple, precise timer for everyday timing and focused work. STOPWATCH • Monotonic clock: changing the device time does not affect the measurement • Hours, minutes, seconds, milliseconds and microseconds on one screen • Unlimited laps with split and signed delta against the previous lap • Statistics: best, worst, mean, median and standard deviation • Copy all laps as a spreadsheet-ready table COUNTDOWN • Set any duration with a simple hours / minutes / seconds stepper • Quick 1, 5, 10, 25, 45 minute and 1 hour presets • Pause, resume and reset • Progress bar and elapsed time • Completion alert with sound and vibration BUILT TO STAY OUT OF THE WAY • One screen, two modes • Dark, high-contrast interface with large tabular digits • Works entirely offline • No ads, no accounts, no tracking, no permissions • Portrait and landscape layouts NOTES ON PRECISION Chrono uses the platform's monotonic clock, so timers are not affected by wall-clock or timezone changes. Values are shown to the microsecond; the screen can only redraw at its refresh rate. This is a precision tool, not a calibrated laboratory instrument. PRIVACY Chrono collects no data and works without a network connection.