The Local (France edition)
"The days of the classic cardboard Paris metro ticket are numbered as the French capital launches its version of London’s Oyster Card."
https://www.thelocal.fr/20190518/this-card-will-start-replacing-paris-metro-tickets-on-june-12th
(The Navigo Easy card was originally to have been introduced in April. By September, Paris Métro riders with Samsung smartphones will be able to use an app to enter the Métro. This feature will not be available right away to iPhone users.)