Unruh - Watch Accuracy
Mechanical Watch Tracker
About
Measure the accuracy of your mechanical watches against atomic time. Track your collection, compare against industry standards, and analyze performance trends over time. Offers diagnostic tools and advanced features for enthusiasts.
What's New in Unruh
1.1.1
July 6, 2026
Removing a watch is now simple, and you can choose how you capture each measurement. - Delete a watch directly from its detail screen. Deletion is reliable and also removes that watch's measurements. - Set up faster: after onboarding you can add your first watch straight from the dashboard. - Choose your capture style in Settings. Keep tapping when the second hand hits 12, or turn on hold-and-release so you simply let go at the exact moment. - Measurements are timed more precisely, because Unruh now reads the exact instant your finger acts rather than a moment later. - Also fixed: tip names appear in your language, and a couple of German labels are corrected.
MoreIn-App Purchases
$5.99
Unruh Pro
Unlimited watches and position tracking.
Developer apps
FAQ
How does Unruh measure watch accuracy?
Unruh measures accuracy by comparing your mechanical watch to an atomic reference time (NTP). You tap when your second hand hits 12, and the app calculates the deviation in seconds per day (s/day).
What are the limitations of the free version of Unruh?
The free version of Unruh allows you to manage up to 3 watches. For unlimited watch management and advanced features like position tracking and CSV export, a one-time purchase of Unruh Pro is available.
Does Unruh have ads?
No, Unruh is ad-free. The app is available for free, with an optional one-time purchase for Pro features.
What industry standards can Unruh compare watches against?
Unruh allows you to compare your watch's accuracy against standards such as COSC Chronometer (-4/+6 s/day), METAS Master Chronometer (0/+5 s/day), Rolex Superlative (-2/+2 s/day), and General Mechanical (-20/+40 s/day).
What diagnostic tools are available in Unruh?
Unruh offers a free Timegrapher (Beta) feature that uses your microphone to measure live beat rate and seconds/day. It also includes a free magnetism check using the device's built-in magnetometer.
How often is Unruh updated?
The latest version of Unruh, 1.1.0, was released on June 12, 2026. Updates are released periodically to improve features and reliability.
What devices does Unruh support?
Unruh is currently supported on iPhone devices. It is designed for iOS operating systems.
What is the age rating for Unruh?
Unruh has an age rating of 4+, making it suitable for users of all ages. The app's content is appropriate for children and adults.