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Both the Federal and Provincial governments have comparable self-assessment tools on their websites. This doesn't appear to be much more sophisticated than that:

Here's the Federal self-assessment: https://ca.thrive.health/covid19/en

Ontario: https://covid-19.ontario.ca/self-assessment/#q0

BC: https://bc.thrive.health/

For the UK, this is the most popular one: https://covid.joinzoe.com/

Though you can access the website from Canada.

Website is here https://www.apple.com/covid19/

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Source please. I don't appreciate my govt behaving this way but I am also skeptical.