Twelve O'clock
Track your watch accuracy
Free · In‑App Purchases
The best watch accuracy tracking app on the store. Created by a watch enthusiast. For watch enthusiasts.
Twelve O’clock is an app that helps track your watch accuracy easily in a realistic way.
I can’t stress this enough: it’s “tracking”, not measuring instantaneous accuracy like a timegrapher device.
It’s a manual and oldschool job but it brings so much fun. It reminds me of the old days when I had to synchronize my watch to the clock on the TV at 7pm every day.
With Twelve O'clock you can:
** MANAGE YOUR WATCH COLLECTION
* Add, edit, remove any item in a list of your watch collection
* Include a nice wristshot of each watch
** KNOW YOUR WATCH ACCURACY
* Simply add some checkpoints and let the app calculate the accuracy in *second per day*
* A nice chart of the accuracy over the time
** LEARN MORE ABOUT HOROLOGY
* Curated content for watch lovers (like me)
- Fix an issue that reset the time format unexpectedly
- Improvements
The developer, Hieu Pham, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hieu Pham
- Size
- 46.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 14.0 or later.
- iPhone
Requires iOS 14.0 or later. - iPad
Requires iPadOS 14.0 or later. - iPod touch
Requires iOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Twelve Plus $0.99
- Copyright
- © 2025 Twelve O'clock App