This app is a timegrapher for tuning fork watches which were introduced by Bullova in the 1960s under the Accutron label. The app uses a microphone to measure the accuracy of tuning fork watches. Please see the trailers for help on obtaining accurate results. The accuracy of the app is dependent on the clock accuracy of your audio card. This manifests itself by a constant error between 0.3 and 1 sec/day. Tuning fork watches are typically adjusted to run 2 sec/day slow on a timegrapher. This will lead to almost 0 sec/day deviations when the watch is worn.

Uses a microphone to measure the tuning fork frequency Plots the recorded audio signal vs index wheel teeth Plots the accuracy in seconds/day vs index wheel revolutions Allows user to zoom into plots Displays the identified tuning fork frequency in Hz Users can select different watch calibers/movements Users can select between available microphone sources

Beta21 Movement added User interface upgraded to WinUI 3. Ability to Analyze First harmonic in addition to Fundamental Improved reliability for using headset microphones