caQtDM vs JSDE
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
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.
JSDE
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JDSE provides an easy way to set up and enrol devices for your end users. It also provides a streamlined way for your users to check their device health, view important information about their device and contact support. Important: JSDE requires that your device is managed by your organizationβs IT department using Jamf Pro and Jamf Service Provider Plan.
Screenshots
Verdict
The clearest difference is update cadence: JSDE at every 2 months against caQtDM's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
caQtDM ships an update every 5 months, JSDE every 2 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.
| Parameter | caQtDM | JSDE |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Every 2 months β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 68 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Helge Brands | JAMF Software |
In-app purchases
caQtDM
No in-app purchases
JSDE
No in-app purchases









