Contact-tracing apps for COVID-19: What you need to know (and do)

Among the most promising, yet also controversial: new smartphone applications that perform contact tracing, currently under construction by private companies and government agencies. Knowing how smartphone-based contact tracing apps work, however, and how they can exchange information without revealing our identities, will enable us to embrace this potentially life-saving technology— and make sure we hold app providers accountable for our right…