Yeah GPS casts too wide a net (imagine being in New York- everyone in a 80-story office building would be within margin of error of a single GPS point).
Bluetooth seems like a better solution, and the Singapore one does it in a privacy-preserving way while storing all data on the phone. Only when a user is infected, then are they asked to upload data.
Bluetooth seems like a better solution, and the Singapore one does it in a privacy-preserving way while storing all data on the phone. Only when a user is infected, then are they asked to upload data.
https://tracetogether.gov.sg