Watch Tracker vs caQtDM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Watch Tracker
Easily track your wristwatch's accuracy against an atomic clock. This app measures and records time differences, displaying detailed graphs of your watch's performance. It's designed to be more accurate and simpler than traditional methods.
- Tracks wristwatch accuracy
- Synchronizes with atomic clock
- Measures and records time differences
- Displays data graphs
- Tracks multiple watches
- Exports data to CSV
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Watch Tracker is a revolutionary app for tracking the accuracy of a wristwatch. It's dramatically easier and more accurate than any previous method. Just tap a button when the time on your watch matches the time displayed by the app, and Watch Tracker does the rest. It synchronizes with an atomic clock, measures and records the difference, and displays graphs of all the data points you've recorded. - Uses best-fit analysis to accurately calculate how many seconds your watch gains or loses per day - Displays graphs of rates and variance - Can track multiple watches simultaneously - Saves data in CSV files that can be opened with any spreadsheet software Watch Tracker is made by the developer of tChess (the chess app that was featured in Apple's "Learn" commercial for the iPad) and Learn Chess (the Apple Staff Favorite e-book).
caQtDM
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The EPICS display manager MEDM is a very powerful tool with many features and satisfies most of the needs for synoptic displays. However MEDM is based on MOTIF/Xt and X11, systems/libraries that are getting into age. Moreover applications using those systems are difficult to maintain and to extend. At PSI a new Qt based application was written, reproducing the functionality of MEDM. Moreover a parser was written to convert the MEDM files into Qt files, the resulting displays being an exact reproduction of the MEDM displays. It has to be noticed that the widgets used are not directly epics aware. The idea was to strictly separate the control system from the display part, in order to be able to add other controlsystems if necesssary (which is still the case for our high intensity particle accelerator). An application is never finished and can always be improved and new things can be added. This is therefore also the case for caQtDM. The widgets could be improved, not everything has been finished and bugs will be found. This App is directly build out of the same sources like the linux/mac or windows version with the help of Qt. For using it a http server with the configuration files (network/gateway/environment) and display files is needed.
Screenshots
Verdict
The clearest difference is price: caQtDM at Free against Watch Tracker's $4.99. caQtDM also leads on iOS requirement (16.0 vs 26.0). Watch Tracker's advantage is chart position (#186 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
caQtDM is free to download; Watch Tracker costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Watch Tracker ships an update every 6 months, caQtDM every 5 months. The most recent releases landed on October 14, 2026 and September 26, 2026 respectively.
| Parameter | Watch Tracker | caQtDM |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.7 (322 ratings) — better | — |
| Positive reviews | 91.2% of reviews | — |
| Number of ratings | 322 — better | — |
| Update frequency | Every 6 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #186 — better | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Tom Kerrigan | Helge Brands |
Bugs and requests
Watch Tracker
Reported bugs
2 issues- Crashes when trying to add photos
- Inconsistent time tracking results
Requested features
4 requests- Add more positional variance options
- Implement cloud sync for data
- Add more customization options
- Improve support for newer iOS versions
caQtDM
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Watch Tracker
No in-app purchases
caQtDM
No in-app purchases









