> I know someone in Germany and their covid tracking app tells you when and where you were close to someone who was last tested positive. So everyone does it the same way, recording location.
Not sure about Germany, but in France the app doesn't track location. It tracks nearby devices (with Bluetooth, rotating identifiers frequently), and when one marks oneself as positive, it informs the central server of the identifiers used in the last X days, which then other apps checks against their list of known identifiers that were close.
My friend was definitely told where he was on the last contact. Doesn't mean his location left the phone though.
[He didn't get Covid this time, but off topic for this discussion.]
Edit: or maybe it's on topic because the location was at some amusement park outdoors. Since he knew where and it was relatively safe, he didn't have to worry much about the test results...
Not sure about Germany, but in France the app doesn't track location. It tracks nearby devices (with Bluetooth, rotating identifiers frequently), and when one marks oneself as positive, it informs the central server of the identifiers used in the last X days, which then other apps checks against their list of known identifiers that were close.
So there is no recording of location.