Download COVID Alert today
COVID Alert is Canada's free exposure notification app.
Together, let's limit the spread of COVID-19 and prevent future outbreaks.
COVID Alert helps us break the cycle of infection. The app can let people know of possible exposures before any symptoms appear.
That way, we can take care of ourselves and protect our communities.
On this page
- Your privacy is protected
- How it works
- Starting in Ontario
- Other provinces
- One part of public health
- Printable digital products and videos for understanding the app
- Digital products to share on social media
- Built in the open
- Contact us
Your privacy is protected
COVID Alert does not use GPS or track your location.
It has no way of knowing:
- Your location.
- Your name or address.
- Your phone's contacts.
- Your health information.
- The health information of anyone you're near.
Nobody will get any information about you or the time you were near them. Learn more about how COVID Alert protects your privacy.
How it works
- The app uses Bluetooth to exchange random codes with nearby phones.
- Every day, it checks a list of random codes from people who tell the app they tested positive.
- If you've been near one of those codes in the past 14 days, you'll get a notification.
Learn more about how it works.
More about how COVID Alert works
The app runs in the background and will not interrupt your activities.
Whenever you're near someone else with COVID Alert, both phones exchange random codes every 5 minutes.
The random codes change often and cannot be used to identify you.
What's an exposure?
The app estimates how near people are by the strength of Bluetooth signals.
If you're closer than 2 metres for more than 15 minutes, the app will record an exposure.
Getting a positive test
If someone with the app is diagnosed with COVID-19, they can choose to upload the random codes their phone sent. The codes go into a central server.
The server only gets the codes. It does not get any information about the person.
Looking for exposures
Every day, whenever it has an Internet connection, your phone will get a list of the random codes from people who reported a diagnosis.
If it finds codes that match, the app notifies you that you've been exposed and explains what to do next.
Starting in Ontario
Ontario is the first province where people can use COVID Alert to report a COVID-19 diagnosis.
Even outside Ontario, it's still helpful to download COVID Alert. That way, when people in your area are able to report a diagnosis, you'll be notified if you were near them.
One part of public health
- COVID Alert is just one part of the public health effort to limit the spread of COVID-19.
- Follow all public health guidelines in your area.
- Use the app for the duration of the COVID-19 outbreak.
- The app does not replace manual contact tracing by local public health authorities.
- COVID Alert does not replace medical advice. If you get sick, contact your doctor or other healthcare provider.
Printable digital products and videos for understanding the app
- COVID Alert: Canada’s COVID-19 exposure notification app (infographic)
- How the COVID Alert app works (video)
Digital products to share on social media
Built in the open
The Government of Canada is building and continually improving the COVID Alert app in the open.
- COVID Alert mobile app advisory council
- COVID Alert mobile app open source repository
- COVID Alert open source server repository
- COVID Alert portal repository
- Report a vulnerability
- Accessibility statement for COVID Alert
Get help with the app.
- Monday to Friday, 7 a.m. to midnight Eastern Time
- Interpretation service available in more than 200 languages
Teletypewriter (TTY): 1-800-465-7735
- Monday to Friday, 8 a.m. to 8 p.m. Eastern Time
Report a problem or mistake on this page
- Date modified: