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Privacy Policy

What Kay does, and doesn't do, with your data.

Tutor Kay is built to help students learn math — not to harvest their data. This page explains exactly what information flows through the app, where it's stored, and who can see it. No analytics, no advertising, no third-party trackers, no email-list signup.

Last updated: June 23, 2026
The short version
If you only read one thing
Section 1

What flows through Kay

Here's every kind of information the app touches, in plain language. Each card shows where the data travels, where (if anywhere) it's stored, and which third parties handle it.

Your chat messages
Every time you ask Kay a question
Travels to
Your browser → Kay's backend server → Anthropic (the AI provider) → reply comes back the same way.
Stored where
In your browser's local storage. Not on Kay's servers. Anthropic temporarily caches API traffic per their policy (typically 30 days).
Who can see it
You. Anthropic (under their privacy terms). That's it. Kay doesn't read or store your chat history.
Want to wipe it? Clear your browser data for tutorkay.ai. Everything's gone.
Photos of your work
When you attach an image to a question
Travels to
Same path as a chat message — sent to Anthropic so Kay can read what you wrote on paper.
Stored where
In your browser session only. Not retained by Kay.
Who can see it
You and Anthropic. Kay's servers pass the image through without storing it.
Voice (microphone)
When you use the mic button to speak your question
Travels to
Your device's built-in speech recognition (Apple's on iOS/macOS, Google's on Android/Chrome). Doesn't pass through Kay's servers.
Stored where
Nowhere by Kay. Your OS may apply its own retention rules.
Who can see it
The transcribed text appears in the input box. Once you send it, it follows the chat path above.
Feedback you submit
Only when you tap "Send feedback"
Travels to
Your browser → Google Apps Script → a private Google Sheet that only Kay's creator can access.
Stored where
In that private Google Sheet, indefinitely (so Kay can improve based on what students tell her).
Who can see it
Kay's creator. If you provide your name or email (both optional), those are stored too — only to reply to you.
Don't want to be contacted? Leave the name and email fields blank. Your feedback still helps.
Anonymous usage counter
Every time anyone asks a question
Travels to
A random per-session ID and a "+1" counter ping → Kay's backend → Upstash (a Redis database service).
Stored where
In Upstash. Used only to show the "questions answered" and "students served" numbers in the sidebar.
Who can see it
Nobody — it's literally just two numbers. No identifying information attached.
Cross-device sync (optional)
Only if you choose to set up a passkey
Travels to
Your browser → Kay's backend → Upstash. Uses standard passkey (WebAuthn) for authentication — no passwords, ever.
Stored where
A random pseudonym like "purple-tiger-7421", a recovery-phrase hash, your concept mastery + practice accuracy stats, and session metadata (titles + timestamps). Chat content is not synced.
Who can see it
Only you, by signing in with your passkey or 6-word recovery phrase. Kay's creator cannot link a pseudonym to a real person.
Want it gone? Tap "Delete account" in the sidebar. Everything tied to your pseudonym is permanently erased from our servers.
Hosting and request logs
Every time the page loads
Travels to
Cloudflare (which hosts the site) and Render (which runs the backend). They see standard request information.
Stored where
In their server logs, briefly, per their standard retention policies. This is the same for any website on the internet.
Who can see it
Cloudflare and Render staff for operational purposes (uptime, abuse prevention). Kay's creator does not browse these logs.
Section 2

Students under 13

Tutor Kay is designed for students preparing for the SAT, ACT, and other secondary-school math — typically ages 14 and up. We do not market the app to children under 13.

Because Kay does not require a name, email, or account to use, the app does not knowingly collect personal information from any student, regardless of age. The data flows described above apply to everyone identically.

If you are a parent or guardian and you believe a child under 13 has used Tutor Kay and provided identifying information (for example, through the feedback form), please contact us at the email below. We will delete any such information promptly and confirm in writing that it's been removed.

We comply with the U.S. Children's Online Privacy Protection Act (COPPA) and the broader principle that children's data deserves extra care.

Section 3

Your rights

Whether you're in California, Europe, or anywhere else, you have the right to:

For California residents specifically: we do not sell personal information, period. The CCPA's "right to opt out of sale" is not applicable because there's nothing being sold to opt out of.

For European users (GDPR): the lawful basis for the limited data Kay does handle is "legitimate interest" in providing a working tutoring service. You can exercise any GDPR right by contacting us.

Section 4

Changes to this policy

If we ever change anything substantive — what we collect, how we use it, who we share it with — we'll update the "Last updated" date at the top of this page and post a notice in the app. Trivial edits (typos, wording cleanups) won't get a notice.

A history of changes will be kept in the public source code repository for anyone who wants to see exactly what changed and when.

Privacy questions go to
Radhika Kolachina
Creator of Tutor Kay
[email protected]