California can stop the spread

Add your phone today to California's exposure notification system

You have the power to help your friends, family and community

Add your phone to California’s exposure notification system to get COVID-19 exposure alerts and to protect those around you.

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 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.

Serious about protecting privacy

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

How will I help?

CA Notify is an added layer of protection for you and your community. In addition to wearing a face covering, physically distancing, and washing your hands, adding your phone will help to keep you and others 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 does not collect or exchange any of your personal information. It does not track your location. It only logs close interactions with others. The anonymous keys are exchanged using Bluetooth and are not linked to your identity or location. The keys will change every few minutes to protect you.

Android users can download CA Notify here.
iPhone users can enable notifications directly in their settings:
1. Tap on the Settings app from your home screen.
2. Scroll down to locate and tap Exposure Notifications—found in the same grouping as Emergency SOS & Battery.
3. Tap Turn On Exposure Notifications and hit Continue.
4. Follow prompts to select Country and State (United States, California).
5. Review and accept the terms and conditions.
6. When prompted, allow Exposure Notifications to access to your phone's Bluetooth.
7. Tap Turn On to enable the notifications on your phone.

It depends on how many people you interact with, how many individuals use Exposure Notifications on their phones, and how many of them have a positive diagnosis. You can expect to get a weekly notification from the service confirming it is still running on your phone.

You will be notified once the COVID positive individual authorizes Exposure Notifications to send out an alert. How quickly you receive the notification will depend on when that person received a positive result and how quickly the information was uploaded. You can be notified of any exposure that happened within the last 14 days.

If you have exchanged keys with someone that has reported a positive diagnosis, you will receive a push notification to alert you. This notification will include instructions on your next steps and who to contact.

The actual date of exposure to COVID-19 may be on the date listed or day prior to the date indicated in the notification. To preserve the privacy of people who used their verification codes and thus triggered your exposure verification, CA Notify system does not provide specific time/day for when someone has reached high level of exposure to COVID-19. Since the time of exposure is determined at the Coordinated Universal Time, 8 hours ahead of Pacific Time, thus the day of your exposure can fall within a two day period if it has occurred between 4pm and midnight.

Your positive test result will only result in Exposure Notifications if you opt in and upload your result to the system. Even then, your personal information is not collected, stored or shared by the exposure notification system.

No. Your positive test result will only result in Exposure Notifications if you opt in and upload your result to the system. Even then, your personal information is not collected, stored or shared by the exposure notification system. If you upload your result to the system, anyone you have exchanged keys with in the last 14 days will receive a push notification alerting them to a possible exposure—but the alert will not tell them where they were exposed or who exposed them.

iPhone users can use CA Notify if they have iOS version 14.2 or later. All iPhones released starting in 2015 support iOS 14: iPhone 12, 12 Mini, 12 Pro, 12 Pro Max, 11, 11 Pro, 11 Pro Max, XR, XS, XS Max, X, SE (2nd generation), 8, 8 Plus, 7, 7 Plus, 6s, 6s Plus, SE (1st generation).
Android users can use CA Notify if their phone supports Bluetooth Low Energy, Android Version 6 (API 23) or above, and can access the Google Play Store.
For further questions concerning Exposure Notifications, please visit

Availability Alerts will let users know if they are in a region that is using exposure notifications, but is not required to receive notifications from CA Notify.

The service was designed to use Bluetooth and data minimally. It should not have a noticeable impact on battery life or data usage.

While CA Notify does not track your location, your Location-Based Alerts need to be on for the system to know when you are close to others. To turn them on go to: Settings > Privacy > Location Services > System Services > Turn ON Location-Based Alerts.

If you get tested for COVID-19 and provide your cell phone number at the time of testing, you will receive a text message from the California Department of Public Health with a verification code that is needed to activate exposure notifications. This message will come from 855-976-8462. If your test result is positive, you can follow the steps in the text message to alert others. You can also call the CA Notify helpline to receive a verification code.

Tell Us how CA Notify has helped you

If you have received an exposure notification, tell us your story

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Need technical support?
Call our Help Desk
Sat-Sun - 10AM-2PM PST

1 (888) 421-9457