Privacy policy

Last updated 13 November 2026

KnullVoid is a study app for school students. Most of our users are children, so we collect as little as we can and we never sell data or show ads. This page explains what we collect, why, and what you can do about it.

What we collect

• Account details you type in: first name, email address, class, and a password (stored only as a hash).
• Study progress: which parts of a chapter you finished, mock test scores, the topics marked for revision, and your daily session streak.
• Questions you send to the AI teacher, so it can reply.

We do not collect location, contacts, photos or microphone audio. The audio revision player reads text aloud on your own device.

Where it is kept during the beta

In the current public beta, your account and progress are saved in your browser’s local storage on the device you use. They do not leave that device, except for questions sent to the AI teacher. Clearing your browser data removes them. When accounts move to our cloud database, we will update this page and tell signed-in users first.

The AI teacher

When you send a question to the AI teacher, the text of the conversation is sent to Google’s Gemini API to write a reply. Do not type personal details such as your full name, phone number or address into the chat. We do not use your questions to advertise to you.

Children and parents

Students under 18 should use KnullVoid with a parent’s or guardian’s permission. A parent can ask us to see, correct or delete their child’s data at any time by writing to the address below. We will reply within 7 working days.

Cookies and tracking

KnullVoid sets no advertising or third-party tracking cookies.

Your rights

You can ask for a copy of your data, ask us to correct it, or ask us to delete your account. Write to founder@knullvoid.tech.

Changes

If we change this policy, we will update the date at the top of this page and note what changed.