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
• 7 and 30 day views included for every watch
• Summary statistics with averages, min & max values
UNRUH PRO — ONE-TIME PURCHASE, NO SUBSCRIPTION
• Unlimited watches (free version: up to 3)
• Position tracking: log how each watch rested — dial up, dial down, crown left, crown up, crown down, or on the wrist
• Best resting position analysis: find the position that compensates your watch's rate
• Full history: 90 day and all-time charts
• CSV export for your records
• Pay once, keep it forever — and all future Pro features are included
DIAGNOSTICS
• Timegrapher (Beta): live beat rate and seconds/day via the microphone — free
• Magnetism check using the built-in magnetometer — free
BUILT FOR WATCH ENTHUSIASTS
• Elegant dark mode design with gold accents
• Haptic feedback for precise measurements
• Daily measurement reminders
• Available in English, German, Japanese, French, Italian and Spanish
Whether you're a seasoned collector or just curious about your first automatic — Unruh is the precision tool your watches deserve.
Ratings & Reviews
4.0
out of 5
1 Ratings
• Unruh now speaks Japanese, French, Italian and Spanish, with watchmaking terms checked for every language.
• Minor improvements.
Version 1.2.0
The developer, Noel Weinberg, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Dark Interface
Information
Seller
Noel Weinberg
Size
5.2 MB
Category
Utilities
Compatibility
Requires iOS 26.0 or later.
iPhone Requires iOS 26.0 or later.
Mac Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.