Cookie and Storage Policy
The short version
We use one essential cookie, only when you log in, and we save your settings and progress on your own device. We use no advertising, tracking or social media cookies, so there is nothing to opt out of and no cookie banner is needed.
1. Cookies we set
| Name | Purpose | Type | Expires |
|---|---|---|---|
JSESSIONID | Keeps you logged in as you move between pages. Set only when you log in. Marked Secure, HttpOnly and SameSite=Lax. | Strictly necessary, first-party | When you log out, close the browser, or after 30 minutes of inactivity |
Cloudflare, which protects our site from attacks, may set a strictly necessary security cookie (for example __cf_bm) to tell people apart from bots. It contains no personal profile and expires within about 30 minutes. See Cloudflare's cookie documentation for details.
2. Information saved on your device (browser storage)
These items stay in your browser's local storage. They are never sent to us unless you are logged in and your progress is synced to your account.
| Key | What it remembers |
|---|---|
phs.theme | Light or dark theme |
phs.progress.v1 | Topics explored, quiz scores, XP, badges and streak |
phs.curriculum | Whether to show NCERT or US standards |
| Sound settings | Mute and volume |
curiosand.hw.<code> | A student's homework answers so far, so they can carry on later; afterwards, their results to look back at. |
curiosand.live.player (session storage) | Lets a student rejoin a live quiz if the page reloads. Deleted when the game ends or the tab is closed. |
3. Analytics
We count visits with Umami, which we host ourselves. It sets no cookies, stores no IP addresses and cannot follow you across websites. If your browser sends "Do Not Track", it does not count you at all.
4. Your choices
You can delete cookies and site data at any time in your browser settings (Chrome, Firefox, Safari, Edge). Blocking the login cookie will stop you logging in; clearing local storage resets your theme and on-device progress. Everything else keeps working.
If we ever add cookies that are not strictly necessary, we will ask for your consent first and update this page.