Last updated 7 September 2026
The short version. TI-84 Chat runs entirely in your browser. It has no server that sees your messages. Your AI provider key never leaves your own machine except to go to the provider you chose. If you sign in, we store your email address and nothing else of substance.
The app is a static web page. When you connect a calculator it talks to it directly over USB using your browser's Web Serial support, and when you ask a question it calls your chosen AI provider directly from your browser. Neither of those goes through a server we operate, because there isn't one.
You supply your own key for whichever AI provider you use. It is stored in your browser's local storage on the device you typed it into. It is sent only to that provider, as part of your requests. It is never transmitted to us, never synced between your devices, and never written to any database we control — deliberately, so that a breach of ours could not expose it.
What you type on the calculator, and what the model replies, pass through your browser and go to your AI provider. We do not receive, log or store them. They are subject to the privacy policy of the provider you chose — Groq, OpenRouter or Google — and you should read theirs, because that is where your conversations actually go.
Signing in is optional; the app works fully without an account. If you do:
That is the complete list. We do not store your messages, your calculator's contents, or your API key.
There are none. No analytics, no advertising, no third-party trackers, and no cookies beyond the session cookie that keeps you signed in if you chose to sign in.
Email the address below and we will delete your account and everything associated with it. To remove your API key, clear this site's data in your browser — it only ever existed there.
The app is aimed at students and is safe to use without an account. Signing in requires an email address; if you are under 13, please use it signed out.
If this policy changes in a way that affects what we collect, the date at the top changes with it.
Questions or deletion requests: [email protected]