Plain-English version of how we handle your family's data.
Last updated: August 17, 2026
🆓Free, with no ads. We don't run advertising and we have no advertising trackers.
🚫We never sell your data — not your child's, not yours. Ever.
👪Parents are in control. A child's account is set up or approved by a parent, and a parent can review or delete it any time.
🔒We collect the minimum we need to teach math — a name, sign-in info, and practice progress. No home address, no precise location, no photos.
1Who we are
Bija (bijamath.com) is a free math-practice tool operated by 909 Technologies ("Bija," "we," "us"). Questions about privacy or data? Email hello@bijamath.com and a real person (Ankur Dhawan) will reply.
2Children's privacy & parental consent (COPPA)
Bija is designed to be set up by a parent or legal guardian. Under the U.S. Children's Online Privacy Protection Act (COPPA), we obtain verifiable parental consent before a child under 13 uses Bija, and we do it through the way accounts work:
A child can only join through a login their parent creates, or a family code the parent shares — children cannot sign themselves up.
When a parent creates a family or a child login, they affirmatively confirm they are the child's parent/guardian and consent to Bija collecting the limited data described below.
A parent can review their child's data, correct a name, stop collection, or delete the child's account at any time by using the parent portal or emailing hello@bijamath.com.
We do not condition a child's participation on disclosing more information than is reasonably necessary, and we do not knowingly collect personal information from a child without a parent's consent. If you believe a child provided us information without parental consent, email us and we will delete it.
3What we collect
From a parent, tutor, or older student who signs in with a phone:
A mobile phone number, used only to send a one-time sign-in code (via our SMS verification provider) and to identify the account.
A display name you choose (often just a first name) and, optionally, a family name.
From a child whose parent creates a phone-less login:
A username and a 6-digit PIN chosen by the parent (no phone number and no real email address are collected for the child).
A first name / display name.
As anyone practices, we store learning data:
Which skills were attempted, whether answers were right or wrong, points and streaks, and review scheduling.
On a wrong answer, the question and the answer that was entered, so we can identify the specific misconception (see Section 5).
An optional school the learner picks to join school-vs-school standings.
We do not collect home addresses, precise/GPS location, photos, contacts, birthdays, Social Security numbers, or any payment information. Bija is free and there is nothing to pay for.
4How we use it
To run the app: track mastery, schedule spaced review, and show a learner their own progress.
To let a parent or tutor see the progress of children in their own family or cohort — including where a child is getting stuck.
To power school standings, which only ever display school-level totals — never an individual child's name or score.
To keep Bija working and secure, and to understand overall, aggregate usage.
5AI features
Bija uses AI to write hints, answer "ask-anything" questions, and name the misconception behind a wrong answer. To do this, the relevant question text and (for diagnosis) the answer that was entered are sent to Amazon Web Services (AWS) Bedrock for processing. This content is used only to generate the response in the moment; it is not used to train AI models. We do not send a child's name to the AI.
6Who we share with
We do not sell personal information and we do not share it for advertising. We use a small number of service providers strictly to operate Bija, under agreements that limit their use of the data:
Supabase — our database and authentication.
Amazon Web Services — hosting and the AI features above.
An SMS verification provider — to send sign-in codes to phones.
We may disclose information if required by law, or to protect the safety and rights of users and the public. If Bija is ever transferred to another operator, we will require the same protections and notify families of any material change.
7Your choices & rights
Parents (and adult users) can, at any time:
See the data tied to their family — a learner's progress lives right in the app.
Correct a name or other detail.
Delete a child's account and its data, or the whole family, by emailing hello@bijamath.com. We honor deletion requests promptly.
Withdraw consent — tell us to stop collecting from your child and we will disable the account.
Depending on where you live (for example, under the California Consumer Privacy Act), you may have additional rights to access or delete your information. Email us and we will help — we apply these protections to all families regardless of location.
8Data retention & security
We keep learning data while an account is active so progress and review scheduling work over time, and we delete it on request or when an account is closed. Data is encrypted in transit, access is limited to what's needed to operate the service, and administrative access is restricted.
9Schools
School names come from public California Department of Education directory data. A learner chooses their own school; standings are aggregate only. Bija is a direct-to-family tool and is not acting as a school official under FERPA unless a school and Bija agree to that in writing.
10Changes
If we make a material change to this policy, we will update the date above and, where appropriate, notify families. Continued use after an update means the updated policy applies.