New: hear faint ticks with the built-in iPhone mic, and log all six positions from a timing machine at once. Check rate and beat error in seconds.
Find out whether your mechanical watch runs fast or slow, using only your iPhone.
Hold the watch against the microphone and Tempochron listens to the escapement, detects the beat rate and shows the daily rate in seconds per day, with beat error and a trust score that tells you when a reading is ready. No microphone contact? Photograph the dial twice against an atomic-time reference and Tempochron works out the daily rate without touching the watch.
FEATURES
• Live rate and beat error with automatic BPH detection
• Live trace and a trust score for every reading
• Faint-tick detection for quiet watches on the built-in iPhone mic
• Camera time checks with a daily-rate history
• Multi-position sessions with a positional summary
• Manual entry for timing-machine results, all positions at once
• Watch profiles with caliber, purchase, warranty and service history
• Private iCloud sync; audio recordings stay on your device
• Wired and USB microphones that iOS exposes as audio inputs
• Made for iPhone and iPad
TEMPOCHRON PRO
The free version covers up to three watches. One purchase, no subscription, adds unlimited watches, multi-position sessions, full history and trends, PDF and CSV reports, JSON backup, raw audio sharing and advanced diagnostics.
Tempochron is a screening tool, not a certified timing machine. Results depend on microphone contact, background noise, position, mainspring state and the movement itself. Use bench equipment for final regulation.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Better readings straight from your iPhone.
• Hear faint ticks: a new detector and a wider frequency range help the built-in iPhone microphone lock on to quiet watches
• Copy a full timing-machine run in one go: enter all six positions in Manual Entry and save them as one positional set
• See the new detector at work in Stats & Diagnostics
• Fixed recording playback in Settings, plus smaller improvements
Version 1.13
The developer, Jan Sokol, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Dark Interface
Sufficient Contrast
Information
Seller
Jan Sokol
Size
6.4 MB
Category
Utilities
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.