Everyone Has a Contact-Tracing App, and Nobody’s Happy About It

Contact-tracing apps seemed like they might turn out to be technological saviors when they made their debut in March. The hope was that some semblance of normal life could return if people knew when they came into contact with someone carrying the novel coronavirus. Yet as the weeks go by, that’s not happening.

The apps, most of which work by using Bluetooth to connect phones to each other and ultimately let people know if they’ve been exposed to the virus, have instead raised hackles about privacy and surveillance. And there are worries about whether the technology is even effective.

People ...