MathVision

Privacy Policy

Last updated: 30 July 2026 · Applies to the MathVision mobile app for iOS and Android.

This policy explains what personal data the MathVision app collects, why we collect it, who can see it, and what you can do about it.

The short version. The app exists so families and our office can message each other and arrange sessions. We collect the contact details needed to run that, the messages you send, and the bookings you make. We do not sell your data, we do not use it for advertising, and we do not track you across other apps or websites.

1. Who we are

The MathVision app is operated by MathVision Enrichment Centre Pte Ltd (UEN 200712084Z), of 1 Claymore Drive, Orchard Towers Rear Block, #08-12, Singapore 229594 ("MathVision", "we", "us"). We are the data controller for the personal data described here.

For any privacy question or request, contact our Data Protection Officer at mathvision.com.sg@gmail.com.

2. What the app is for

MathVision is a private app for families enrolled at our tuition centre and for our own staff. It replaces messaging our office over WhatsApp, and it lets families request tuition sessions. Accounts are created by us or by a parent — the app is not open to the general public.

3. What we collect

Category	What it includes	Why
Account details	Name, email address, mobile number (optional), role (parent, student, staff), the household you belong to, and for students the grade level and school.	To sign you in, to show the right person's name on a message, and to route your questions to the right team.
Messages and attachments	The text of messages you send in the app, and any photos, documents or voice notes you attach (typically homework and worksheets), including the file name, type, size and — for a voice note — how long the recording is.	To deliver them to the people you are writing to, and to keep the conversation history you and our staff both rely on.
Session bookings	The student, subject, topic, preferred times, duration, mode (in person or online), any notes you add, the outcome, and any rating or feedback you leave.	To schedule sessions and keep a record of what was arranged.
Calls	Who called whom, when, and how long the call lasted. We do not record call audio.	So the office can see that a call happened and follow up.
Device and notifications	A push notification token and your device platform (iOS or Android).	Solely to deliver notifications for new messages and booking updates.
Centre records	An internal reference linking your app account to your existing record in our centre's own system, plus your course enrolments.	So the app shows your real courses and the office is not maintaining two separate lists of families.

What we do not collect

We do not collect your location.
We do not collect your contacts or your photo library — the app only receives the specific photos you choose to attach.
We do not use advertising identifiers, analytics SDKs, or cross-app tracking. The app reports its own crashes so we can fix them, and that is the only thing it sends anywhere other than MathVision — it carries no message content and does not follow you between apps.
We do not record voice calls. A voice note is different — you record it deliberately and send it, and it is then stored like any other attachment and deleted on the same schedule.
We do not take payments in the app, so we hold no card details.

4. Children and student accounts

Many of our students are under 18, and some are under 13. Student accounts are created by a parent or guardian, or by our office at a parent's request — a child cannot open an account on their own.

A parent or guardian in a household can see the conversations belonging to that household, including messages sent by their child to our staff. Parents may ask us at any time to review, correct, or delete their child's data, or to close the child's account, by writing to mathvision.com.sg@gmail.com.

We do not direct advertising at children, or at anyone, and we do not profile students for any purpose beyond running their tuition.

5. Who can see your messages

This is the part most people actually want to know, so we are being specific.

Your household. Parents and students in the same household share their conversations with the centre. If you are a parent, you can see your child's threads with us; if you are a student, your parent can see yours.
Other families cannot see your messages. Ever. This is enforced by the database itself, not only by the app.
Our staff. A thread you start with a team (for example Support) is visible to the members of that team, so somebody can always answer when a colleague is away. A thread about a course is visible to the staff responsible for that course. A member of staff may bring a colleague into a thread when they need help with it.
Administrators. A small number of administrators can see all threads, in order to run the centre and support the app.

6. How we use your data

We use personal data only to:

operate the messaging and booking features you are using;
send notifications you have enabled;
schedule, staff, and follow up on tuition sessions;
keep records our centre needs for administration and billing (billing itself happens outside the app);
keep the service secure, diagnose faults, and prevent misuse;
meet legal obligations.

We rely on your consent, and on the performance of our tuition agreement with you, as our bases for handling this data under Singapore's Personal Data Protection Act (PDPA). You may withdraw consent at any time — see section 9 — though doing so may mean we can no longer provide the app.

7. Who we share it with

We do not sell personal data, and we do not share it for anyone else's marketing. We use a small number of service providers who process data strictly on our instructions:

Provider	What they handle
Supabase	Hosts the database, file storage, and sign-in. This is where your account, messages, attachments, and bookings live.
Expo	Relays push notifications to Apple and Google.
Apple (APNs) and Google (FCM)	Deliver push notifications to your device.
LiveKit	Carries in-app voice calls. Audio is not recorded or stored.
Sentry	Receives a report when the app crashes: the error, where in the app it happened, and which version you are running. Message text, file links and the addresses the app calls are removed before the report is sent.

We may also disclose data where the law requires it, or to protect the safety of a student or another person.

8. Where your data is held

Our systems and the providers above may store or process data outside Singapore. Where that happens, we take steps required by the PDPA to ensure a comparable standard of protection to Singapore law.

9. Your rights

Access and correction. You can view and edit your name and mobile number on the Account screen. For anything else, write to us.
Deletion. The Account screen has "Delete my account". It permanently removes your profile, your messages, and the files you sent. Records our centre must keep for its own administration — for example a history of sessions attended — are kept outside the app. Full instructions, and exactly what is deleted and what is kept.
Notifications. You can turn push notifications off in your device settings at any time.
Withdrawing consent. Write to us and we will tell you what that means for your account before acting on it.

We aim to respond to any request within 30 days.

10. How long we keep it

We keep your account and its conversation history for as long as your family is enrolled with us, and for a reasonable period afterwards so we can answer questions about past tuition. Delete your account and the data described above is removed immediately.

11. Security

Data is encrypted in transit. Access is restricted at the database level by role, so the rules described in section 5 are enforced by the system rather than left to the app to remember. Attachments are stored privately and are only reachable through short-lived links issued to people already in the conversation. No system is perfect, but we take this seriously and review it as the app changes.

12. Changes to this policy

If we change this policy we will update the date at the top, and we will tell you in the app if the change is significant.

13. Contact us

MathVision Enrichment Centre Pte Ltd
1 Claymore Drive, Orchard Towers Rear Block, #08-12, Singapore 229594
Data Protection Officer: mathvision.com.sg@gmail.com
General enquiries: mathvision.com.sg@gmail.com

If you are not satisfied with our response, you may contact Singapore's Personal Data Protection Commission at pdpc.gov.sg.