caQtDM vs ZhiHand
Price, ratings, monetisation and update history for both apps, side by side — 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.
ZhiHand
This utility app facilitates on-screen task assistance by connecting your iPhone to a paired OpenClaw workspace and device. It allows for input via text, voice, images, and files, with options for screen recording and pointer calibration.
- Pair with OpenClaw workspace
- Connect ZhiHand Device for control
- Enable Eye tracking when needed
- Send various input types
- Save local screen recordings
- Calibrate pointer movement
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ZhiHand connects your iPhone, your paired OpenClaw workspace, and ZhiHand Device so OpenClaw can help with on-screen tasks. Use ZhiHand to: pair with your OpenClaw workspace by QR code or pair link connect ZhiHand Device for click, typing, back, and navigation turn on Eye only when OpenClaw needs to see the screen send text, voice, images, videos, and files as task input save local screen recordings when you explicitly enable recording save calibrate pointer movement on iOS with the built-in Pointer Lab ZhiHand keeps you in control: screen sharing starts from the iOS broadcast picker microphone is only used when you choose Tap to speak camera is only used to scan a pairing QR code you can stop tasks, stop screen sharing, or unpair OpenClaw at any time
Screenshots
Verdict
The clearest difference is update cadence: ZhiHand at every 9 days against caQtDM's every 5 months. On price, 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
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, ZhiHand every 9 days. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.
| Parameter | caQtDM | ZhiHand |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 16 |
| Further details — not scored | ||
| Size | 68 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Helge Brands | Beijing Echang Technology Co., Ltd. |
In-app purchases
caQtDM
No in-app purchases
ZhiHand
No in-app purchases








