Privacy Policy

Who we are

Mathicorn is an independent, family-made educational game created by Brian Harmon. Questions about this policy or your data? Email [email protected].

What we collect — and when

If you don't sign in (the default): The game saves coins, medals, and progress only on your own device (in local storage on the web, or the app's storage on a phone). None of it is transmitted to us or anyone else. No account, no email, nothing.

If a parent chooses to turn on Cloud Sync (an optional feature behind a grown-ups area), we collect the minimum needed to back up and sync progress:

• Email address — used only to create and sign in to the parent account.
• Player display name & avatar choice — the name a child types and the cartoon avatar they pick (e.g. "unicorn"). No real-world identity is requested.
• Game progress — coins, medals, practice statistics, settings, and owned in-game items, so they can appear on the family's other devices.

We do not collect real names, birthdates, photos, location, contacts, advertising identifiers, or any behavioral/tracking data.

How we use it

Solely to run the game and, if you enabled it, to back up and synchronize a family's progress across their devices. That's it. We do not profile users, advertise, or build marketing lists.

Where data is stored (our service providers)

• Supabase — provides the secure database and login service that stores synced progress. Data is protected so that each family account can only access its own data.
• Cloudflare — hosts the website. Like any web host, it may process technical information such as IP addresses to deliver the site securely. We don't use this for tracking.

These providers act on our behalf as data processors; we don't sell or share data with anyone for their own purposes.

Website analytics (mathicorn.com only — not the game)

The marketing website (these pages you're reading) uses Cloudflare Web Analytics to count visits and see which pages are read. It's a privacy-first tool: no cookies, no device fingerprinting, and no ability to identify an individual visitor or follow anyone across sites — just an aggregate count of traffic. This applies only to the marketing pages; the game itself has no analytics of any kind. Progress data (coins, medals, practice stats) never leaves your device unless you turn on Cloud Sync, as described above.

Children's privacy

Mathicorn is designed to be safe for children and is built with COPPA in mind. Any account is created and controlled by a parent or guardian from a grown-ups area protected by a simple parental gate. We do not knowingly collect personal information from a child beyond a chosen display name and avatar. We never ask children for personal details, and the app contains no ads, no in-app purchases, no social features, and no third-party tracking. A parent can review or delete their family's data at any time (see below).

Keeping data, and deleting it

You're in control:

• Playing without signing in? Clearing your browser's storage (or deleting the app) removes everything — it was only ever on your device.
• Used Cloud Sync? In the grown-ups area, open Cloud Sync and tap Delete account to permanently remove your account and all synced data — right from the app, no email needed. You can also delete an individual player or sign out at any time. Questions? Write to [email protected].

Security

Connections are encrypted (HTTPS). Synced data is guarded by row-level security rules so one family's data can never be read by another. No login is ever required to play.

Changes to this policy

If we change how the app handles data, we'll update this page and the "last updated" date above.

Contact

Brian Harmon · [email protected]