Watch Tuner for iOS

Watch Tuner is a utility application that transforms an iPhone into a portable timegrapher, allowing users to diagnose the accuracy of mechanical watches. By leveraging the device's microphone, it measures key parameters such as rate in seconds per day, beat error in milliseconds, and amplitude with user-input lift angles. The app supports both automatic and manual detection of Beats Per Hour, enhancing its functionality for watch collectors and amateur watchmakers. Additional features include noise-filtering settings and a results history, which tracks measurements for multiple watches, facilitating comparisons over time.

The application captures the audible ticks of a watch movement, converting these sounds into precise timing data. While it operates effectively in quiet settings, users are encouraged to use a headset microphone for optimal results, particularly in noisy environments. With adjustable signal controls and varying detail levels, the app caters to both casual collectors and more experienced hobbyists. Although it offers significant portability, users should be aware of the limitations associated with smartphone microphones compared to traditional bench timegraphers.