https://www.reuters.com/article/us-health-coronavirus-usa-apps/showdown-looms-between-silicon-valley-u-s-states-over-contact-tracing-apps-idUSKCN22702F

U.S. states promoting apps that could prove essential to ending the coronavirus lockdown may be headed for a showdown with the two Silicon Valley companies that control key software on 99% of smartphones over the collection of sensitive GPS location data.