Horlogemeter - Watch Accuracy

**Measure the accuracy of your mechanical watch with your iPhone.** Horlogemeter turns your iPhone into a powerful mechanical watch timegrapher. Using the microphone to listen to your watch movement, Horlogemeter analyzes its acoustic signal and provides detailed timing measurements in seconds. Whether you're checking a newly serviced watch, comparing different movements, or simply curious about how your watch is performing, Horlogemeter gives you the information you need. **Measure your watch** • Rate and daily accuracy • Beat frequency (BPH/VPH) • Beat error • Amplitude • Timing stability **A timegrapher in your pocket** Place your iPhone over the watch crystal and let Horlogemeter listen to the movement. No dedicated timegrapher is required. Horlogemeter is designed for mechanical and automatic watches and can help you monitor their performance wherever you are. **Understand your results** Go beyond a simple accuracy number. Horlogemeter analyzes your measurement and helps you understand what the results mean for your mechanical watch. **Keep track of your watches** Save your measurements and build a history for each watch. Compare results over time and monitor changes in your watch's performance. **Made for watch enthusiasts** Whether you are a collector, enthusiast, or simply want to know how accurately your mechanical watch is running, Horlogemeter puts watch timing analysis in your pocket. **How it works** 1. Place your mechanical watch as instructed. 2. Position your iPhone over the watch crystal. 3. Start the measurement. 4. Let Horlogemeter analyze the movement. 5. Review your rate, amplitude, beat error and other timing data. Discover how your mechanical watch is really performing. **Horlogemeter — Measure. Analyze. Understand your watch.**