Comparison

KNX V2 vs Smartbell

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KNX V2

Features
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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.

About

Smartbell

Features
Read full description

Mit der Smartbell A10 lernen Sie eine neue Art der Haustürklingel kennen. Eine Bestellung der Türklingel ist jederzeit auf codext.de möglich.

Screenshots

KNX V24 screens
Smartbell3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 5 level
KNX V2 versus Smartbell: the parameters behind the verdict, then further details
ParameterKNX V2Smartbell
PriceFreeFree
Update frequencyEvery 4 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size56 MB29 MB
Age rating4+4+
DeveloperFeller AGCodext GmbH

In-app purchases

None

KNX V2

No in-app purchases

None

Smartbell

No in-app purchases

Questions

Is KNX V2 free?
KNX V2 is free to download, with no in-app purchases.
Is Smartbell free?
Smartbell is free to download, with no in-app purchases.
Do KNX V2 or Smartbell have ads?
Neither KNX V2 nor Smartbell shows ads.
Which is updated more often, KNX V2 or Smartbell?
KNX V2 ships an update every 4 months, and Smartbell every 6 weeks. Most recently, KNX V2 was updated on August 27, 2026 and Smartbell on September 17, 2026.

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