New feature: Wrist time tracking
Chronographer helps you track the long-term accuracy of your mechanical watches.
Use Chronographer to periodically collect data points comparing a watch’s time to the current correct time. Chronographer stores this information and uses it to create charts that help you visualize your watches’ performance over time. It also calculates detailed metrics about each watch’s overall accuracy. Chronographer tracks offsets (the difference from the correct time) and daily rate (how many seconds a watch gains or loses per day). Graphs show individual data points and best-fit trend lines over timespans ranging from a week to a year. Histograms provide insight into how various offset and deviation values are distributed.
Chronographer calculates the following metrics:
• Average Offset
• Max. Positive Offset
• Max. Negative Offset
• Last Offset
• Net Gain/Loss
• Best-Fit Rate
• Average Rate
• Fastest Rate
• Slowest Rate
• Last Rate
• Rate Variance
• Best-Fit Rate Drift
Chronographer stores information about your whole watch collection. Give each watch a name and, optionally, a longer description. You can select a picture from your Photos library and add additional notes, such as the watch’s specifications, purchase details, and service history. All information can be stored in iCloud and automatically synchronized between your devices.
Log the watch (or watches) you wear each day. Chronographer’s wrist time tracking feature lets you see which watches you wear the most and how long it’s been since you’ve worn each one.
You can use Chronographer to track positional variation. Whenever you record a data point, you can include the position (dial up, crown up, etc.) that the watch was stored in. Then, you can restrict the charts and metrics to specific positions and compare the results.
For best results, collect a data point for each of your watches every day or two.
Chronographer includes a large digital clock to help when you set your watches.
You can export your watch data to local storage or to iCloud Drive. This is useful for backups and to share your data.
For more information, including a detailed user’s guide, see https://www.rmfrance.net/chronographer
This app excels at two things: 1. Tracking the offset / accuracy of your mechanical watch, 2. Helping you to easily set your watch. As far as tracking the accuracy of your watch, I really like the ‘time was set’ option so that you don’t have to start a new timing run just because you update the time of the watch. As for setting the time, I really like the atomic clock with the loud ticks and beep at the top of the minute, and find it to be a very thoughtful feature. I recently regulated my Seiko automatic watch using TG, and it's very satisfying to be able to see the fruits of my effort using this app.Big thanks to the developer.
• Added wrist time tracking:
- To log the watch (or watches) you wear each day, use the Worn Today button (hand icon) at the bottom of the watch’s detail view.
- To compare wrist time, press the Wrist Time button (hand icon) at the top of the main watch list.
- The number of days since each watch was last worn is shown on its card in the watch list.
- Worn days are highlighted in blue on the watch’s scatter plot.
• Terminology change: The number of seconds that a watch gains or loses per day is now called its “rate” (or “daily rate”), rather than “deviation.”
• Requires iOS 18 or newer.
Version 1.5.0
The developer, Robert France, 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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Robert France
Size
2.8 MB
Category
Utilities
Compatibility
Requires iOS 18.6 or later.
iPhone Requires iOS 18.6 or later.
iPad Requires iPadOS 18.6 or later.
Mac Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
