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Duolingo tries to guess your birthdate

  1. Thanks to GDPR, you can request to download a copy of your personal data from https://www.duolingo.com/abc-privacy
  2. The page tells you to send an email to privacy@duolingo.com
  3. Then you receive an email which tells you to go to the page https://drive-thru.duolingo.com/ and click on “Access Personal Data”
    Duolingo Access Personal Data GDPR Request
  4. You receive a confirmation email and few minutes later another email with a link to download a copy of your personal data
  5. After uncompressing the file “duolingo.zip”, you can see quite a few files.
  6. In particular, you can see in the file “metrics.csv” which shows that Duolingo tries to guess your approximate birthdate/birthday:

    approximate_birthdate,country_code
    YYYY-MM-DD HH:mm:ss.fff,XX


    It is kind of funny to see Duolingo trying to guess my birthdate up to the milliseconds!

    Feel free to request your personal data too! 😊
    Please let me know in the comment: how good the Duolingo guess was? ✍️

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