This tool assists watchmakers in diagnosing issues within watch gear trains. By inputting tooth counts and movement details, it calculates turn times, tooth passage, and other metrics to pinpoint the source of amplitude irregularities shown on a TimeGrapher trace.
1.4.1
April 15, 2026
Added French and Swiss French localisations. Various bug fixes.
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Watch Gear Calculator helps watchmakers diagnose problems in watch gear trains. It analyzes irregularities shown on a TimeGrapher trace by calculating metrics like turn time and tooth passage based on user-inputted gear data.
You start by inputting the movement's BPH or wheel rotation speeds. Then, you enter the tooth counts for each wheel. Pressing 'calculate' provides results to help identify the source of amplitude changes seen on a trace.
The provided data does not specify offline functionality. However, the app's core function involves calculations based on user input, suggesting it may operate without a constant internet connection for basic calculations.
You need to provide the number of teeth for each wheel in the gear train. Optionally, you can also input the movement's BPH (beats per hour) or the RPMs of the 2nd and 4th wheels for more accurate calculations.
No, Watch Gear Calculator does not contain advertisements. The app is free to use and does not display any ads to users.
The latest version is 1.4.0, released on January 6, 2026. While specific update frequency isn't detailed, this indicates recent development and ongoing support for the application.
Watch Gear Calculator is available for both iPhone and iPad devices. It is designed to run on Apple's mobile operating systems.
Yes, you can save your calculations by naming the movement and hitting save. You can also share your calculations with other users and view calculations shared by the community.
