SwissCovid app

All questions on this topic
Why is Bluetooth technology used?
What is a private key?
Where are the servers for the SwissCovid system located?
What is an identification code? What is a random ID?
What is the difference between a validation code and a Covidcode?
How is the Bluetooth technology used?
In which languages is the SwissCovid app available?
I have more than one mobile phone. Can I install the app on all my mobile phones?
Has the Federal Data Protection and Information Commissioner been involved in the development of the SwissCovid app?
Is the SwissCovid app free to install and use?
How much has it cost to develop the SwissCovid app, and who is paying for it?
What mobile phones can the SwissCovid app be installed on?
Is the SwissCovid app barrier-free?
What operating system version to I need to use the SwissCovid app? Also, where can I find out what version my mobile phone has?
Who provides the Exposure Notification interface?
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