COVID-19 Contact-Confirming Application

COVID-19 Contact-Confirming Application, abbreviated as COCOA, is a COVID-19 application for smartphones provided by the Ministry of Health, Labour and Welfare of Japan. The application uses Bluetooth to detect and record suspected close contacts between users. If the contact is diagnosed with COVID-19, the user will be notified. After receiving the notification, the user can consider self-isolation or go to a medical institution for treatment.

  • COVID-19 Contact-Confirming Application
  • COCOA
Original author(s)COVID-19 Radar Japan
Developer(s)Ministry of Health, Labour and Welfare
Initial releaseJune 19, 2020 (2020-06-19)
Stable release
1.4.1 / November 26, 2021 (2021-11-26)
Repository
Written inC#
Operating system
Available in3 languages
List of languages
License
  • app: proprietary
  • source: MPL 2.0
Websitewww.mhlw.go.jp/stf/seisakunitsuite/bunya/cocoa_00138.html
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