Colorado COVID-19 Exposure Notifications for Android or iPhone devices

On October 25th, in partnership with Google and Apple, the state of Colorado launched its COVID-19 statewide exposure notification system. The service can quickly notify users if they’ve been exposed to COVID-19 so they can reduce the risk to loved ones, seek medical advice, and slow the spread of the virus.

By opting in, your Android or iPhone device will share anonymous tokens with other CO Exposure Notifications users using your phone’s Bluetooth. If another user you’ve been near tests positive for COVID-19 within a 14-day period, the service will notify you. If you test positive, you can easily and anonymously notify others to stop the spread of COVID-19. This is a voluntary service and you can turn it off at any time.

The service was created with your privacy in mind. Everything is anonymous. The service does not use your GPS to track your location and no personally identifiable information is collected, stored, or transmitted.

We encourage you to strongly consider activating CO Exposure Notifications. Knowing about an exposure allows you to reduce the risk to your family, friends, neighbors, coworkers and community.

For more information about the technology, including FAQs and instructions for downloading the application, please visit, and for additional resources on COVID-19, see

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