Watch Tuner Timegrapher PL is a utility application designed for iPhone that allows users to analyze the performance of mechanical watches. With this app, users can measure accuracy (rate), beat error, and balance amplitude.

The app utilizes the iPhone's built-in microphone or a headset to record the sounds produced by the watch mechanism. It is important to perform the measurement in a quiet environment, as any noise can negatively affect the results. For optimal results, it is recommended to place the microphone of the headset near the watch's crown.

Watch Tuner Timegrapher PL provides valuable insights into the performance of mechanical watches, allowing users to identify any issues or deviations in their timekeeping. Whether you are a watch enthusiast or a professional watchmaker, this app can be a valuable tool in your arsenal.