Komfovent C6

is this project dead? some alternative?

Why don’t ask on GitHub resp. contact the developer. An email address can be found at the profile of the app developer.

Btw, this is the search result in this forum:

So this app was never a topic in this forum. Probably because it’s an “unofficial” Homey app that can only be installed via CLI. And maybe the app developer had no interest in making his app available to the public via the normal way via the App Store. Or this app doesn’t meet Athom’s criteria to be published in the App Store.