Smart Screens vs eCall C
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Smart Screens
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Note: The Smart Screens app is a companion app for the BAB TECHNOLOGIE APP MODULE from Firmwareversion 1.6.2 Control IoT, KNX and EnOcean devices in just one app? No problem with the APPMODULE and the brand new »Smart Screens«. Whether Philips® hue, Panasonic®, Sonos, Nuki or DoorBird: Many of the Smart Home Apps available from the BAB APP MARKET can now be controlled directly with your smartphone. Download »Smart Screens« and connect your smartphone to the APP MODULE. Create your first smart screen in just a few minutes and combine functions of different products - easily, individually. This way you control different IoT and KNX components in one interface. Please also check in the App Manager whether your installed apps are up to date.
eCall C
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OTIS eCall C can call elevator via Bluetooth. The elevator would be summoned when you trigger "up & down" button in app, and then you can register the destination floor when you get into the cabin via app. Before calling elevator, you need to add OTIS elevator in the APP in advance, and enable your mobile Bluetooth. KEY FEATURES: -Summon elevator and select destination floor -Add multiple buildings and change whenever you need.
Screenshots
Verdict
The clearest difference is update cadence: Smart Screens at weekly against eCall C's every 3 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.
Smart Screens ships an update weekly, eCall C every 3 months. The most recent releases landed on October 5, 2026 and October 27, 2026 respectively.
| Parameter | Smart Screens | eCall C |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.2 — better | 12.0 |
| Further details — not scored | ||
| Size | 38 MB | 34 MB |
| Age rating | 4+ | 17+ |
| Developer | BAB TECHNOLOGIE GmbH | Otis High Rise Elevator (Shanghai) Co.,Ltd. |
In-app purchases
Smart Screens
No in-app purchases
eCall C
No in-app purchases









