Comparison

caQtDM vs BHand

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

caQtDM

Features
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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.

About

BHand

Features
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This app helps you configure your gas sensor via your mobile device. You simply power up your compatible device and use the app to configure it via Bluetooth. You can configure your device with this app: - The network to connect to, and configure how to connect to your data server. - Data protocols used, security certificates. - Download cached data (if supported by device). - and more.

Screenshots

caQtDM4 screens
BHand4 screens

Verdict

The call

The clearest difference is update cadence: BHand at every 2 months against caQtDM's every 5 months. BHand also leads on iOS requirement (14 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

caQtDM ships an update every 5 months, BHand every 2 months. The most recent releases landed on September 26, 2026 and October 2, 2026 respectively.

Scorecard2 real differences ยท 4 level
caQtDM versus BHand: the parameters behind the verdict, then further details
ParametercaQtDMBHand
PriceFreeFree
Update frequencyEvery 5 monthsEvery 2 months โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS16.014 โ€” better
Further details โ€” not scored
Size68 MB38 MB
Age rating4+17+
DeveloperHelge BrandsTongdy Sensing Technology Corporation

In-app purchases

None

caQtDM

No in-app purchases

None

BHand

No in-app purchases

Questions

Is caQtDM free?
caQtDM is free to download, with no in-app purchases.
Is BHand free?
BHand is free to download, with no in-app purchases.
Do caQtDM or BHand have ads?
Neither caQtDM nor BHand shows ads.
Which is updated more often, caQtDM or BHand?
caQtDM ships an update every 5 months, and BHand every 2 months. Most recently, caQtDM was updated on September 26, 2026 and BHand on October 2, 2026.

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