Yes. This has an identifier (RPI) that changes every 10 minutes (in a way that can’t feasibly be tied back together, unless you declare yourself infected and up

Yes. This has an identifier (RPI) that changes every 10 minutes (in a way that can’t feasibly be tied back together, unless you declare yourself infected and upload your diagnosis key), and it does not share or upload any location data whatsoever. All it does is store the RPIs it sees, downloads diagnosis keys, and checks whether any of the RPIs it has stored “belongs” to one of the diagnosis keys it has downloaded.