ChronoBeat: Watch Timegrapher

Turn your iPhone into an acoustic mechanical watch analyzer. ChronoBeat listens to the tick of your mechanical watch and analyzes it directly on your iPhone. Place the watch near the microphone — or use supported AirPods microphone input — and ChronoBeat estimates the beat rate (BPH), beat error and, when the signal allows it, the daily rate. YOUR iPHONE LISTENS. CHRONOBEAT ANALYZES. • Beat rate (BPH) detected from the sound itself — 18,000, 21,600, 25,200, 28,800, 36,000 BPH and other standard rates, never assumed • Beat error from the timing difference between tick and tock, shown only when the two can be reliably separated • Rate in seconds per day, with its uncertainty, when the measurement is stable enough • Timegrapher-style trace of every beat • Signal quality, stability and a confidence score for every result • Live analysis while you measure: BPH, beat error, signal, confidence and detected beats HONEST BY DESIGN If the signal cannot support a value, ChronoBeat shows “--” and explains why instead of inventing a number. Results below the confidence threshold are never saved and never count as a test. ON-DEVICE ACOUSTIC DSP Band-pass filtering, envelope extraction, transient detection, autocorrelation and a robust timing fit run entirely on your iPhone. No cloud processing, no audio upload, no account. Measurements work in Airplane Mode. BUILT FOR WATCH ENTHUSIASTS • Watch profiles for your collection • Position tags (dial up, dial down, crown up/down/left/right) • History grouped by watch, with notes • Statistics: averages, rate trend, rate by position and charts • CSV and JSON export, shareable result cards • Apple Watch companion with your latest results and complications PRICING Try 3 successful measurements for free. Failed or cancelled attempts never count. Unlock unlimited measurements with a one-time ChronoBeat Lifetime purchase — no subscription. Free and paid tests use the same measurement engine. PLEASE NOTE ChronoBeat is an acoustic timing analyzer, not a certified timegrapher and not a replacement for professional watchmaking equipment. Results depend on your watch, microphone, placement and room noise. ChronoBeat does not measure amplitude. AirPods microphone availability depends on your AirPods model, iOS version and connection. Support: [email protected]