Viessmann also uses analytical tools for this purpose, e.g. Webtrends or AppSee. The data provided and used is collected and saved completely anonymously. This data may under certain circumstances also be saved outside Germany or the European Union.
You can prevent such data being transmitted via corresponding settings in your browser or app, or the executing operating system environment (iOS, Android), but this may lead to problems with retrieval or operation, or with the functionality of the offered content or service in some cases.