Hairspring: Watch Timegrapher
Rate, Beat Error & Amplitude
About
This app analyzes mechanical watches, measuring rate, beat error, and amplitude. It provides detailed reports, compares measurements, and offers guidance for accurate readings. The app is designed for privacy and includes all features with a single purchase.
What's New in Hairspring
1.0.2
August 27, 2026
Measure twice—and keep the evidence. A completed rate verification now stays with the saved measurement in History and in its PDF report, including both readings, their fit uncertainty, the agreement limit, verdict, and analysis version. Amplitude ranges are now consistent throughout the app, position summaries describe observations without over-diagnosing the movement, and Settings reports the installed app version accurately.
MoreFAQ
What is Hairspring's price?
Hairspring is available for a one-time purchase of $9.99. This purchase includes all features, with no subscriptions or in-app purchases required.
Does Hairspring have ads?
No, Hairspring is completely ad-free. The app is designed to provide an uninterrupted user experience without any advertisements.
What devices does Hairspring support?
Hairspring is currently supported on iPhone devices. It requires a mechanical, not quartz, watch for analysis.
How often is Hairspring updated?
The latest version, 1.0.2, was released on August 27, 2026. The app was initially released on August 18, 2026, indicating recent development activity.
Is Hairspring suitable for beginners?
Hairspring includes a visual setup guide and live signal-path coaching to help users achieve accurate readings. While it offers advanced analysis, these tools aim to assist users in proper setup and usage.
Can Hairspring analyze quartz watches?
No, Hairspring is specifically designed for mechanical watches. It measures characteristics unique to the escapement of mechanical timepieces and cannot be used for quartz watches.
What kind of reports does Hairspring generate?
Hairspring generates PDF measurement receipts that can be shared with watchmakers. These reports include rate, beat error, amplitude, and statistical uncertainty of each reading.
How does Hairspring handle bad data?
Hairspring is built to withhold bad data. If there is too much scatter, an implausible result, or timing too disturbed, it provides a clear explanation and suggested fix rather than a misleading number.
