Effective September 2026. WatchTimegrapher provides free, browser-based, microphone-derived estimates of mechanical watch rate and beat error, for hobbyist and informational purposes only.
This tool is not a certified or calibrated measuring instrument. Readings are estimates derived from consumer microphone audio and are affected by background noise, microphone quality and placement, and watch positioning. Do not rely on this tool for warranty claims, resale valuations, or professional servicing decisions — consult a qualified watchmaker for those.
Results are provided "as is," without warranty of any kind. We are not liable for decisions made based on these measurements.
Don't scrape, resell, or misrepresent the service, or present its output as a certified or professional measurement.
support@watchtimegrapher.com