Time & Calculators
NewWatch Clock Check
Set and track mechanical watches with local profiles, offset logs, and optional server-time calibration.
watchclockoffline
Browser-firstOptional server checkOffline watch logs
Reference clock
Intended for setting mechanical watches, not certified timing
Device-onlyOnline
Loading local clock...
Using this device's clock
Local timezone: loading...
Calibration age
No calibration
Freshness
Device-only
Uncertainty
Device clock only
Within a few seconds is fine for most mechanical watches.
Device clock calibration
Compared against rbits hub server time when online.
More samples take longer and can smooth out noisy network timing.
Guided set mode
Use the best available reference time to set the watch cleanly.
Device-only
Loading local clock...
Next :00 in --:--
Using this device's clock
Hacking seconds
Pull the crown when the seconds hand reaches 12, advance the minute hand to the next target minute, wait for the app to hit :00, then push the crown in exactly at :00.
Watch profiles
Profiles, tolerances, and watch-specific details stay local.
Add a watch to start tracking offsets and resting positions.
Offset logs
Positive offset means the watch is fast versus the active reference.
Add or select a watch before logging offsets.
Watch is exact versus reference.
Device-only
No offset logs yet.
Position tracking
Position effects are approximate and improve as you add logs.
Not enough data yet to recommend a resting position.
Settings
Stored locally in this browser.
Power reserve helper
Add power reserve hours to the active watch to estimate remaining reserve.