Unruh - Watch Accuracy

Is your mechanical watch running fast or slow? Unruh tells you exactly — down to the fraction of a second.

Unruh measures the accuracy of your mechanical watches by comparing them against atomic reference time (NTP). Simply tap when your second hand hits 12, and Unruh instantly calculates how far off your watch is.

PRECISION MEASUREMENT • Atomic time reference via NTP synchronization • Offset measurement accurate to fractions of a second • Rate calculation in seconds per day (s/day) • Minute correction for fine-tuning results

WATCH COLLECTION • Manage your entire watch collection in one place • Add photos, brand, model, movement & serial number • Track each watch's accuracy individually • Set and compare against accuracy standards

INDUSTRY STANDARDS • COSC Chronometer (-4/+6 s/day) • METAS Master Chronometer (0/+5 s/day) • Rolex Superlative (-2/+2 s/day) • General Mechanical (-20/+40 s/day) • See at a glance if your watch meets certification standards

ANALYTICS & TRENDS • Offset deviation charts over time • Daily rate trend visualization • Filter by 7 days, 30 days, 90 days, or all time • Summary statistics with averages, min & max values

BUILT FOR WATCH ENTHUSIASTS • Elegant dark mode design with gold accents • Haptic feedback for precise measurements • CSV export for your records • Daily measurement reminders • Full German & English localization

Whether you're a seasoned collector or just curious about your first automatic — Unruh is the precision tool your watches deserve.