caQtDM vs BLE
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.
BLE
This utility tool assists developers in creating and maintaining Bluetooth Low Energy products. It enables connection establishment, monitoring, and configuration for RF testing of BLE devices. Log files can be shared for further analysis.
- Connect to BLE devices
- Monitor connections
- Configure connection parameters
- Start/stop test mode
- Share log files
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This tool is intended to support developers in their work to develop and maintain Bluetooth Low Energy products. BleRf Test can measure the quality of an RF link in both direction for any product implementing the BLE service for RF test. Features: - establish a connection to a BLE device - monitor said connection - share log files with other smartphone apps This app is only intended to support the development of BLE devices.
Screenshots
Verdict
The clearest difference is update cadence: caQtDM at every 5 months against BLE's every 64 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, BLE every 64 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | caQtDM | BLE |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months — better | Every 64 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 68 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Helge Brands | Arendi AG |
In-app purchases
caQtDM
No in-app purchases
BLE
No in-app purchases









