Privacy
Short version: your notes never leave your browser. Here is the honest long version.
Notes and boards
Everything you write, notes, canvas drawings, formulas, stays in your browser (IndexedDB). Tuboard has no server that stores your notes, and nothing gets uploaded anywhere unless you talk to the AI tutor.
The AI tutor
Asking the AI tutor sends your question, plus whatever board or note content it needs to answer, to a language-model provider so it can reply. That request isn't saved afterward: it exists only long enough to generate the response. It reaches the provider one of two ways. If you signed in with Google, your ID token is checked only to enforce a daily message limit (a plain counter, not a profile), and the request goes through Tuboard's proxy with a shared key. If you supplied your own API key instead, it stays in your browser (or your OS's secure storage in the desktop app), and the request goes straight from your device to the provider. Tuboard's servers never see it.
Accounts
There is no Tuboard account. Signing in with Google is only ever used for the daily message limit above, and Tuboard keeps no user database.
Analytics and cookies
None today. No analytics script, no tracking cookie, no ad pixel runs on this site or in the app.
Open source
The code is public on GitHub. Read exactly what it does instead of taking our word for it.