Slow the Spread of COVID-19

Use CA Notify to continue protecting yourself and those around you from COVID-19.

We can help our friends, family and community

CA Notify is a free service that allows you to find out if you were exposed to COVID-19. You can also notify others if you test positive, while remaining anonymous. Your personal information is never collected, so you and those around you can stay safe.

How does it work?

Once you activate CA Notify, it does all the work. All you do is keep your Bluetooth on. You will only receive alerts if you were in close contact with someone who tests positive for COVID-19. Your privacy is protected as your identity is not known and your specific location is not tracked.

Imagine that two people have Exposure Notifications turned on. If they come within six feet of each other for 15 minutes or more within a day, their phones will exchange keys (randomly generated, anonymous numbers) that log that close interaction.

If one person later tests positive for COVID-19 and agrees to share that information with CA Notify, then the other will receive an alert that they have been exposed. That notification will include instructions on who to contact and what to do next.

Learn more about how CA Notify works

Serious about protecting privacy

CA Notify does not gather:
Your name
Your contact information
Your specific location or movements
The identity of the people you meet
Our privacy policy has been updated.
Learn more about how California is protecting your privacy.

How does it help?

When we get vaccinated, wear masks, and wash our hands, we can save lives. As we get back to big in-person events, CA Notify is an added layer of protection. It is one more thing you can do to keep you and those around you safe.

Add your phone today


Android users can download CA Notify on the Google Play Store here.

Download CA Notify from the Google Play Store

If you require technical support,
contact the Help Desk
1 (888) 421-9457

Join your community

People across California are coming together to save lives. Join them by adding your phone today.

Frequently asked questions

CA Notify is a free exposure notification system for smartphones, made possible by the California Department of Public Health, to alert you if you’ve been exposed to COVID-19. CA Notify is easy to use, private, secure, and 100% voluntary. It’s available for both iPhone and Android phones. CA Notify helps keep communities safe from COVID-19 by alerting people if they need to get tested or stay home.

Now that California’s economy is fully open, people are out-and-about again. CA Notify is an important tool in California’s toolbox to reduce COVID-19 (along with vaccination, masking, and handwashing). Going to a large event like a concert or sporting event? CA Notify can inform you if you are exposed to COVID-19 by another CA Notify user. If you test positive for COVID-19, CA Notify will enable you to anonymously inform others that they have been exposed (without sharing your identity). Exposure notifications help people stay safe and stop the spread.

Yes! Research in other countries and states indicates that thousands of infections and hundreds of deaths can be prevented through the use of exposure notifications. Also, the more people that use it, the larger the benefit for all of us.

CA Notify is free and available on most smartphones. Activation is simple. iPhone users simply go to their settings, turn on Exposure Notifications, and select U.S. and California as their region. Android users download the app through the Google Play store and follow the prompts.

CA Notify works if you and others in our community activate it on your smartphones. If another CA Notify user who has been near you (for a certain amount of time or longer) tests positive for COVID-19, and then uses the system to notify others, you will get an alert telling you that you were exposed. The system can’t tell you who exposed you or where you were when the exposure occurred. CA Notify uses Bluetooth technology to estimate how close your phone is to other peoples’ phones and for how long. It does not use GPS, and it does not track your specific location.

Need help activating your phone or have questions?

Call: 1 (888) 421-9457
Visit for more information.

Yes! CA Notify uses low energy Bluetooth to measure how close you are to other phones (instead of your exact location). Your phone’s Bluetooth exchanges random keys (like ABC123DGGG67) with the phones of nearby CA Notify users. It’s like your phone giving another phone an anonymous high-five! Bluetooth must be on for the CA Notify to communicate with nearby phones.

CA Notify only works in California. However, several other states in the US and many other countries use similar exposure notification systems to protect their residents against spread of COVID-19. You can choose to activate exposure notification systems that are offered by locations you visit and can reactivate CA Notify once you are back.

CA Notify is designed to protect your privacy and security. Using Bluetooth technology, it tracks how close you are to other users. CA Notify does not track your specific location. It does not use GPS. It does not know your immigration status. It does not share your identity or specific location with other users, or with the state of California. Your phone exchanges random keys (via Bluetooth) with other phones – keys that don’t contain personally-identifiable information. You can’t be identified by your phone’s key because the keys change every 15 minutes.
Visit our website for information on how your privacy is protected.

Yes! California will be dealing with COVID-19 for some time. We are still learning many things about the virus, such as how long the vaccines are effective and how well vaccinations protect against new COVID-19 variants. Even if the risk is much smaller for vaccinated people, we know that fully vaccinated individuals may still contract and spread COVID-19. Also, we know that a large group of Californians are still unvaccinated. For all these reasons, we encourage all Californians to activate CA Notify on their phones– to help stop the spread of COVID-19.

No, the CA Notify tool itself does not use or store any personally identifiable information, and is designed to protect your privacy. It uses your phone’s Bluetooth to exchange randomly generated keys that are not associated with your phone number, name, or specific location. These keys change every 15 minutes. Keys are only stored on a user’s smartphone until the user who tests positive decides to activate the notification system. After 14 days, or once an alert is activated, the keys are permanently erased from the smartphone.
Visit our website for information on how your privacy is protected.

No, people 13 years old and older may use CA Notify if their parent or legal guardian provides consent. If a parent has added CA Notify to the phone of someone who is 13 to 17 years old, and the child tests positive for COVID-19, the parent will be provided a code. The parent would then enter that code in the CA Notify system via the child’s phone, and the child’s recent contacts would be informed of possible exposure.

If you are exposed to COVID-19 by another CA Notify user who has tested positive, and who has chosen to notify other CA Notify users, you will receive a text notification on your smartphone. Within your settings (iOS) or app (Android) you will see your approximate date of exposure. Your notification will provide you with information and resources to help you stay safe, get tested, and seek care if needed.

You will receive a text message from the California Department of Public Health (from 1-855- 976-8462). You’ll be given a unique URL link. If you click on that link, you’ll start the CA Notify notification process on your phone. Any phones running CA Notify that were within close proximity to your phone for a certain amount of time when you were likely infectious will receive an alert of possible exposure. The notification will tell users the approximate date of exposure but will not include any information about where, by whom, or exactly when they were exposed.

No, contact tracing works by interviewing people who test positive for COVID-19 to identify people they know they were close to while they were infectious. Human contact tracers reach out to people by phone, email, and text to obtain this information and help people get the support they need to isolate or quarantine. CA Notify does not track or trace any personal information to assess your exposure: it only records how close different phones are to each other and for how long. It can alert people of an exposure to someone they were close to, even if those two people don’t know each other and never realized they were near each other.

CA Notify is available in 15 different languages – Arabic, Cambodian, Chinese, English, Farsi, Hindi, Japanese, Korean, Pashto, Russian, Spanish, Tagalog, Thai, Vietnamese, and Western Armenian.

CA Notify uses low energy Bluetooth (and not GPS). It should have minimal effect on your smartphone’s battery life and no effect on data usage.

Interested in sharing your experience with us?

How did you feel when you got an exposure notification?

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Need technical support?
Call our Help Desk

1 (888) 421-9457