Corra sets no advertising or cross-site tracking cookies at all. What it does use is browser storage — to keep you signed in, to remember your display preferences and to let the app work offline — plus analytics cookies from Firebase Analytics, which counts feature usage.
These cannot be switched off without breaking sign-in or losing your work, and they hold no advertising identifier.
Firebase Analytics is enabled and sets measurement cookies to distinguish one visit from another. What is sent is deliberately thin: event names and a one-way hash of your user ID. Names, email addresses, free text and anything a teacher typed are stripped before an event is sent, and long strings are replaced by their length.
Several categories are simply absent, and it is worth naming them.
Your browser can block or clear all of this from its privacy settings, and clearing site data for this domain removes everything Corra has stored locally. Blocking the strictly necessary items will sign you out and disable the offline cache. Deleting your account clears the server side as well.
Last updated: 2026-07-21
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