European Commission Pushes Apps to Track Coronavirus Exposure

European officials have a plan to use smartphone apps to stem the Covid-19 pandemic without trampling on the bloc’s strict privacy rules: track individuals’ exposure to the virus without tracking their locations. The European Commission — the EU’s executive arm — called on member states to build an interoperable system of voluntary apps that use short-range radio waves to measure users’ proximity to one another, rather than tracking their phones’ physical locations, such as with the Global Positioning System (GPS).