# Chronographer — Track your mechanical watches

> Mechanical watch accuracy tracker with detailed metrics and collection management. (iPhone/iPad app by Robert France.)

- Source: https://appshunter.io/ios/app/chronographer/id6448242917 (this page in markdown: same URL + `.md`)
- Developer: [Robert France](https://appshunter.io/developer/1684138105)
- Category: Utilities, Lifestyle
- Price: Free (on sale, was $1.99)
- Rating: 3.00/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.6 · 3 MB
- Languages: American English
- Released: 2023-07-17
- Data updated: 2026-08-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/chronographer/id6448242917/reviews.md

## What is Chronographer?

Chronographer is for people who enjoy mechanical watches. It does two things:
   1. Tracks your watches’ long-term accuracy
   2. Records wrist time

Chronographer can work with your whole watch collection. Give each watch a name and, optionally, a longer description. Select a picture from your Photos library and add additional notes, such as the watch’s specifications, purchase details, and service history. All information is stored in iCloud and automatically synchronized between your devices.

To track a watch’s accuracy, periodically collect data points comparing its indicated time to the current correct time. Chronographer tracks offsets (the difference from the correct time) and daily rate (how many seconds it gains or loses per day). It uses this information to create graphs and histograms that help you visualize your watch’s performance over time.

Chronographer also 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

You can 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 identify positional variation. When you record a data point, 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.

Chronographer includes a large digital clock to help when you set your watches.

For more information, including a detailed user’s guide, see https://www.rmfrance.net/chronographer

## Key features

- Track mechanical watch accuracy
- Calculate detailed performance metrics
- Visualize accuracy with charts and histograms
- Manage watch collection with notes and photos
- Log daily watch wear
- Analyze positional variation
- Export watch data

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/chronographer/id6448242917/reviews.md

### 1/5 — Excel file is better than this

*2026-07-12*

Total junk

### 5/5 — Very handy app

*2026-01-12*

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.

## Frequently asked questions about Chronographer

### What is Chronographer?

Chronographer is a utility app designed to help you track the long-term accuracy of your mechanical watches. It allows you to record time differences, calculate various performance metrics, and visualize your watches' behavior over time through charts and histograms.

### How does Chronographer track watch accuracy?

You periodically record data points comparing your watch's time to the current correct time. Chronographer stores this information to calculate metrics like average offset, net gain/loss, and rate variance, providing insights into your watch's performance.

### Can I manage my watch collection with Chronographer?

Yes, Chronographer allows you to store information about your entire watch collection. You can give each watch a name, add descriptions, attach photos, and include notes about specifications, purchase details, and service history.

### Does Chronographer support iCloud synchronization?

Yes, all your watch information can be stored in iCloud and automatically synchronized across your devices, ensuring your data is accessible and up-to-date wherever you are.

### Can I track which watches I wear most often?

Chronographer includes a wrist time tracking feature that lets you log the watches you wear daily. This helps you see which watches are worn most frequently and how long it has been since you last wore each one.

### Does Chronographer have ads?

No, Chronographer is ad-free, providing an uninterrupted experience for tracking your watch accuracy and managing your collection.

### What devices is Chronographer available on?

Chronographer is available for iPhone and iPad, supporting a seamless experience across Apple's mobile devices.

### How often is Chronographer updated?

The latest version of Chronographer is 1.5.0, which was last updated on May 1, 2026. This indicates a recent update, suggesting ongoing development and support for the application.

## Version history (last 5 releases)

### 1.5.2 — 2026-07-25

• Allow the Wrist Time chart to extend to the bottom of the screen.
• Minor adjustments to the Wrist Time view’s layout.
• Improved data point and regression line scaling in scatter plots.
• Performance improvements.

### 1.5.1 — 2026-06-25

• Fixed a typo in the Welcome screen.
• Improved the responsiveness of progress indicators.
• Improved the handling of sounds during app termination and active/inactive transitions.
• Performance improvements.

### 1.5.0 — 2026-05-01

• 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.

### 1.4.3 — 2026-02-09

• Use a simplified New Data Point form when adding a watch’s first data point (no mention of the previous data point).
• Fixed an issue where the scatter plot scroll position sometimes shifted when switching between the offset and deviation views.
• Fixed handling of swipe-to-dismiss for the Welcome sheet.
• Performance improvements.

### 1.4.2 — 2025-12-12

• Replaced the data point list’s Sort Order button with a menu.
• Added the app version number and a link to the Chronographer web page to the clock.
• Improved the alignment between user interface elements and system controls.

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## Related topics

[chronographer](https://appshunter.io/ios/topics/chronographer) · [watch accuracy](https://appshunter.io/ios/topics/watch-accuracy) · [watch accuracy meter](https://appshunter.io/ios/topics/watch-accuracy-meter) · [wristwatch](https://appshunter.io/ios/topics/wristwatch)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-09.*