I have a question: the app is not available in the CH App Store and you have to register on the internet. And my question is whether it is also possible without registration?

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Accepted Answer

To use Alexa, you need an Amazon account. It is advantageous to create a German account, e.g. with your G-mail address via PC. If you set your mobile phone to German (Germany), the installed app is also in German. Search the Internet for Alexa APK or directly for Amazon App. You can also get the latest version of the Alexa app via the Amazon Appstore (Amazon App). However, make sure that the language has been set to Germany beforehand, otherwise the Alexa app will not display it. 
You can also set up Alexa via your computer. alexa.amazon.de, but your computer language must also be set to Germany, otherwise you will find the page in English.

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Question about Amazon Echo Dot 2nd generation

I have a question: the app is not available in the CH App Store and you have to register on the internet. And my question is whether it is also possible without registration?