Privacy Policy

Version 2026-10-09

Nobl Tutor is a maths tutor for children in grades 4 to 10, run by Nobl Kids. A parent creates the account and each child’s profile. Children don’t have accounts, emails or passwords of their own. This page says what we collect, why, where it’s kept, and how you control it.

What we collect about your child

• The display name, avatar and grade you choose for their profile.
• Their learning activity: which problems they practised, the answers they chose, the hints they asked for, and when and for how long they practised.
• Homework questions they type in, which are only numbers and fractions.
• In a spoken lesson (“Talk it through”), which a parent switches on first: a recording of the conversation (your child’s voice and the tutor’s) and a written transcript of it, together with the tutor’s notes about what it noticed.

We don’t collect a child’s email, surname, school, or photos of them, and nothing they type beyond answers to maths steps.

What we collect about you

• Your name, email address and mobile phone number.
• How you sign in: a password (stored only as a secure hash by our sign-in system) or your Google account.
• A record of when you accepted these policies, and a one-way hash of your IP address at that moment.

How we use it

• To run the tutor: pick what your child practises next and show their progress.
• To show you, in the app, what your child has worked on, including a weekly summary.
• To sign you in and keep your account secure, including codes texted to your phone.

We don’t sell data, show advertising, or run analytics or tracking tools in the app. No third-party scripts run on your child’s screens. We only email you to verify your address or reset your password.

Artificial intelligence

The maths in every lesson (the numbers, the steps and the drawings) comes from our own code, not from an AI model. An AI model never marks an answer and never decides what your child has learned.

In a button lesson, the wording of a hint may be adapted by an AI model (Google’s Gemini) to the answer your child just picked. The model is given the step and the child’s choice, never their name; a rewording that strays from our script is thrown away for the script.

In a spoken lesson, what your child says is sent to our voice provider to be understood and answered. Our voice provider is OpenAI. Our tutor is also built to run on Google’s Gemini or on ElevenLabs; if we change provider we will update this page and ask you to accept it. The provider receives your child’s speech and the lesson’s text, not their name or your account details. The tutor’s explanations are written by an AI model (Google’s Gemini) and checked against our own maths before they are spoken.

We keep a recording and a transcript of each spoken lesson for 90 days so that you can review it in the Parent area; you can delete either at any time. Before the first spoken lesson, the app asks a parent to agree to this section.

Where your data is kept

Your family’s data is stored on Google Cloud in the United States (Iowa, us-central1), and in a spoken lesson your child’s speech is processed by our voice provider in the United States. If you live in Canada, this means your information is transferred to, stored and processed in the United States, and may be accessible to authorities there under U.S. law.

We use these service providers, only for the purposes described:

• Google Cloud: hosting, database, and the storage of spoken-lesson recordings.
• Google (Gemini on Vertex AI): adapting the wording of hints, and writing the spoken tutor’s explanations (receives the lesson’s text and your child’s answers, never their name).
• OpenAI: in a spoken lesson, understanding what your child says and speaking the tutor’s replies (receives your child’s speech and the lesson’s text, never their name).
• Twilio: texting sign-in codes to your phone (receives your phone number).
• SendGrid, a Twilio company: sign-in emails (receives your email address).
• Google: only if you choose to sign in with Google.

How long we keep it

• Your child’s learning history stays while their profile exists.
• The drawn walkthrough of each problem is kept for 90 days. After that, the summary of the problem stays but the drawing is removed.
• The recording of a spoken lesson is deleted after 90 days, and the words of its transcript are removed after 90 days; the summary of the lesson (which steps were right, which hints were given) stays with the learning history.
• When you delete a child’s profile, it’s kept for 30 days in case you change your mind, then permanently deleted along with all of their learning history, recordings and transcripts.
• If photo homework is ever switched on, worksheet photos are deleted within 24 hours.

Your choices and rights

• Download everything we hold about your family at any time: Parent → Data & privacy. The download includes every spoken lesson’s transcript.
• Delete a child’s profile at any time from their page in the Parent area.
• Delete a spoken lesson’s recording and transcript at any time from that problem’s walkthrough in the Parent area.
• To correct information, delete your whole account, or ask a question, email privacy@noblkids.com.

The Parent area asks you to confirm it’s you (password, a code to your phone, or Google) before it shows progress or settings, and again before any download or deletion, so a child using the family device can’t get in.

Security

Data is encrypted in transit (HTTPS) and at rest on Google Cloud. Access is limited to the people who run the service.

Changes

If we change this policy in a way that matters, we’ll ask you to read and accept the new version the next time you open the app.