Privacy
Last updated 11 November 2026
The short version
- You can practise without an account. Your game then lives in your own browser and is not sent to us.
- We do not show ads, and we do not sell or rent anyone’s data.
- We count visits and practice anonymously, with no name, email or IP address in the record. Turn on Do Not Track or Global Privacy Control and we count nothing.
- Clarity is for students aged 13 and over.
What we keep, and where
| What | Where it is kept | Why |
|---|---|---|
| Your game: answers, Mistake Notebook, streak, stars, drops, outfits, practice test results | In your browser’s storage, on your device | So the game remembers you between visits |
| Account, if you make one: email address, a password (stored only as a scrambled hash) or your Google sign-in, and the display name you choose | Our database, run by Supabase | To sign you in and show your name |
| Progress in the original app at /app: practice history, review queue, saved words, and any score report numbers you entered | Our database, tied to your account | So your study history follows you between devices |
| Anonymous usage counts: which screen was opened, whether a page was turned in, how many were right, and how many days since this browser first played | Our database, under a random id your browser makes up | To see where people get stuck and whether practice brings them back |
| Feedback and chat reports you send | Our database, with your account email | To answer you and to act on reports |
Anonymous usage counts
Each count holds an event name, the screen name (for example “/play”), the site you arrived from (only its name, such as google.com), a few numbers about the event, and a random id kept in your browser. It holds no name, email address, account id or IP address, and nothing you type. We use our own database for this and no outside analytics or advertising service.
If your browser sends Do Not Track or Global Privacy Control, nothing is counted. Clearing your browser’s site data removes the random id.
Study Hall and friend matches
In the Study Hall and in matches, other players see your display name and your mascot’s outfit. Messages are passed along live and are not stored by us. Typed messages are checked on your device before they are sent, and again when they arrive, and messages with insults, contact details, links or personal questions are blocked. Typing needs a signed-in account so that a report can name the sender. Please do not share your full name, school, address, phone number or social media handles in chat.
Payments
Practice is free and buying water drops is not open yet. When it opens, card payments will be handled by Stripe. We will receive a record of the purchase (which pack, the amount, the date), and we will never see or store card numbers.
Other companies involved
- Supabase runs our sign-in, database and live messaging.
- GitHub Pages serves the site’s files. Like any web host, it sees the IP address your browser connects from.
- Google Fonts supplies the typefaces, so your browser fetches font files from Google.
- Google, only if you choose “Continue with Google”, tells us your email address and name.
We share data with these services only so that Clarity can run. We do not give or sell personal data to advertisers or data brokers.
Cookies
Clarity sets no advertising or tracking cookies. It uses your browser’s local storage to keep your game, your sign-in session and the random id described above.
Children and teens
Clarity is meant for students aged 13 and over and is not directed to children under 13. If you are under 13, please do not create an account or use the chat. If you are under 18, ask a parent or guardian before making an account, and a parent or guardian must make any purchase. A parent who believes a child under 13 has given us personal information can ask us to delete it.
Seeing, changing or deleting your data
- Game kept in your browser: clear this site’s data in your browser settings and it is gone.
- Display name: change it from your profile.
- Account and anything tied to it: ask us and we will delete it. While signed in, use Send feedback in the app at satclarity.com/app and say you want your account deleted.
Depending on where you live, you may also have the right to a copy of your data or to object to how it is used. Ask the same way and we will help.
How long we keep things
Account data stays until you ask us to delete it. Anonymous usage counts are kept so that we can compare one season with the next. Chat messages are not stored at all.
Changes
If this page changes in a way that matters, we will change the date at the top and say so on the front page.