KNX V2 vs Smartbell
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KNX V2
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With the updated Feller KNX app, lighting, blinds, climate control, and other functions can be conveniently operated via smartphone or tablet. Thanks to the new, intuitive design and customizable options—such as renaming functions or choosing symbols—the app offers flexible usability. Switching between favorites, rooms, scenes, and automations ensures quick and easy navigation. In residential settings, the KNX app serves as a remote control for managing functions in individual rooms or entire sections of a building. In offices, meeting rooms, or training spaces, the new KNX app can be used in combination with a tablet for convenient control during presentations. Your benefits: • Presence simulation deters burglars before they act. • The timer function allows time-based control of devices. • With the smart button function, KNX switches can trigger app scenes. • Supports user rights management as defined by the system integrator, allowing different permissions for individual users. • Integration of the Solar Manager widget is possible. • Data export and import functionality. • Switch between different installations via the menu (e.g., apartment / holiday home). • Live visualization provides real-time overview of window states, room temperatures, and operating modes. For more information about the KNX app or the KNX/App Interface V2, please contact your electrical installer or visit our website at feller.ch/knx. Note: This app is compatible with the KNX/App Interface V2, article number: 36141-00.REG.
Smartbell
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Mit der Smartbell A10 lernen Sie eine neue Art der Haustürklingel kennen. Eine Bestellung der Türklingel ist jederzeit auf codext.de möglich.
Screenshots
Verdict
The clearest difference is update cadence: Smartbell at every 6 weeks against KNX V2's every 4 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.
KNX V2 ships an update every 4 months, Smartbell every 6 weeks. The most recent releases landed on August 27, 2026 and September 17, 2026 respectively.
| Parameter | KNX V2 | Smartbell |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 56 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Feller AG | Codext GmbH |
In-app purchases
KNX V2
No in-app purchases
Smartbell
No in-app purchases









