Duct Sensor Assistant vs RPEMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Duct Sensor Assistant
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Via the Belimo Duct Sensor Assistant App it is possible to extend the range of use and to adapt the configuration individually to application requirements. A Bluetooth® dongle is required for configuration via the Belimo Duct Sensor Assistant App (sold separately, A-22G-A05). Features: • Communication via Bluetooth BLE • Bluetooth Dongle A-22G-A05 required, which will communicate with the sensor via a Micro-USB-connector • Can be used for the following sensors: 22ADP-.., 22DTH-..5.., 22DTH-..6.., 22DC-..3, 22DTC-.., 22DTM-.., 22DCV-.., 22DCM-.., 22DCK-.., 22UTH-..50X, 22UTH-..60X • Supported languages DE, EN, FR, IT, ES, PT Configuration options: • Individual configuration of output signals • Setting of different measuring ranges • Additional adjustment of offset values • Parameterization of Live-Zero-Signal (2..10 V etc.) and the system of units • Setting options for display indications • Customized parameterization of traffic-light function (TLF) • Extension of the physical bus address • Store settings on the mobile device and load on other sensors • Representation and output of the differential pressure as a volume flow value
RPEMS
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RPEMS was developed by RCT Power to facilitate users to use and monitor energy storage systems. RCT Power is an energy storage system company integrating R&D, production and sales. Its products and technologies come from Lake Constance in Germany. Its products cover household, industrial and grid energy storage.
Screenshots
Verdict
Duct Sensor Assistant and RPEMS are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
Duct Sensor Assistant ships an update every 6 months, RPEMS every 10 months. The most recent releases landed on September 16, 2026 and May 13, 2026 respectively.
| Parameter | Duct Sensor Assistant | RPEMS |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 31 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | BELIMO Automation AG | Jiangsu RCT Power Energy Technology Co., Ltd |
In-app purchases
Duct Sensor Assistant
No in-app purchases
RPEMS
No in-app purchases









