COCOA - COVID-19 Contact App

28.6K reviews
Content rating
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About this app

The service of Contact-Confirming Application COCOA will be discontinued.
Please update to the lastest version of this app and start the procedure to end the service.
Regarding Service Discontinuance, please refer to the below URL.

This app is for use in Japan.

■ Supported OS versions
Android 6.0 or higher

■ FAQ & Contact
FAQ (Japanese):

■ Privacy Policy & Terms of Use
Privacy Policy(English):
Terms of Use(English):
Updated on
Nov 11, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted
28.6K reviews
Todd Schmidt
June 19, 2020
Easy install. I always have Bluetooth off unless connected to headphones, so breaking that habit will be difficult. This doesn't work unless Bluetooth is on. Anyone with privacy concerns, none here, but I hope you have turned of GPS location tracking. I'm not sure those people who are concerned about privacy are even aware their location data is being tracked and stored. See Google Maps TimeLine, which I use. Personally I would favor a more aggressive contact tracing app for the case of Corona.
83 people found this review helpful
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February 19, 2021
I had this app deleted after it finding out it wasn't working properly since Sept last year, meaning you wouldn't get notifications even if you came into contact with someone. Even now, you won't get notifications unless you open the app daily. This is an unbelievable waste of taxpayers money and I really hope someone is held accountable for this massive failure.
53 people found this review helpful
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Chris Bartlett
October 27, 2020
Works very well, took a second to install, didn't ask for any info, just gets on with it. Note that you only get anything out of it if it detects that you were close to someone who had the virus for at least 15 minutes. As hardly anyone has it in Japan, you likely won't get many hits, maybe none, at the moment at least (Essentially because preemptive efforts like this are working).
28 people found this review helpful
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What's new

・Announcement of Service Discontinuance is displayed on various screen. (including welcome screen)
・A function to stop application and OS background refresh has been added.