Limited testing leaves COVID-19 app glitches overlooked Sorry, but your browser needs Javascript to use this site. If you're not sure how to activate it, please refer to this site: https://www.enable-javascript.com/ The government's COVID-19 contact-tracing smartphone app, dubbed COCOA, is displayed on a smartphone screen. | KYODO Jiji Apr 16, 2021 The health ministry on Friday released a report blaming limited testing for glitches in the government’s COVID-19 contact-tracing smartphone app that were overlooked for a prolonged period. The glitches in the app for Android smartphones prevented users from being notified even if they had contact with individuals infected with the novel coronavirus from late September last year, when an updated version was released.