// what we keep, and why

Privacy

We keep the email you give us and, if you make an account to play, your player name and your win/loss record. We don't sell it, we don't advertise to you, and we'll delete it the day you ask.

Who we are

This site is run by The C++ Alliance, which is the data controller for everything described here. For anything on this page (a copy of your data, a correction, a deletion, or just a question), email rob@cppalliance.org. Our servers are in the United States, so that's where this data is held.

What we collect

What	Why	Lawful basis	How long
Your player account Player name, email address, a one-way hash of your password (never the password itself), and when the account was made and last used.	So you can log in and we can keep your game record.	Performance of the service you asked us for.	Until you ask us to delete it.
Your game record For each game: whether you won, lost or left partway; casual or strict mode; how many turns it ran; when it started and finished.	To show you your own record, and to see, across everyone, how many people are playing and whether the game is too hard.	Performance of the service, and our legitimate interest in improving the game.	Deleted with your account.
Anonymous play totals Per day: how many games were started and finished, how many were won or lost, how long they took, whether the browser looked like a phone or a desktop, and how many were played without an account. Also how many games got as far as a given turn, so we can see where people stop: a count of games per turn mark, with nothing tying one mark to another or to a game.	To see whether people are playing, whether the game is too hard, and whether it works on a phone.	Not personal data: these are counters, not records of you. There is no name, no account, no address and no individual game in them, so nothing here can be traced back to a person.	Kept indefinitely. There is nothing in them to delete.
Login attempts The name or email typed in, the IP address it came from, and whether it worked.	To notice and block someone guessing passwords at your account.	Our legitimate interest in keeping accounts secure.	90 days, then automatically deleted.
Feedback you send us What you wrote, the page you were on, your email if you chose to give one, and your player name if you were signed in.	To fix what's broken and improve the game.	Our legitimate interest in improving the game, plus your consent for the optional email, which we only use to reply.	Until it's dealt with and no longer useful.
Your email address, if you asked to hear about the launch, plus the page that sent you here.	To email you about Boost CCG.	Your consent, given when you typed it in.	Until you unsubscribe. Every email has a one-click link.

The Build Tracker keeps nothing about you at all. It runs in your browser, holds your match in the page while you play, and forgets it when you close the tab. The only thing it sends us is a count: that a match was started, that one was finished or started over, and, while a match is open in front of you, that a match has been running one minute, then five, then ten, and so on. Each of those carries how long the match had been going, the mode, the number of Features and whether it was a phone or a desktop. We use them to see how long a match stays worth keeping open. The running count stops as soon as you look away from the page or stop tapping it. Those counts sit in their own daily totals, separate from the browser game's, with no identifier, no account and no time of day. Nothing ties one of them to another, so a single match cannot be picked out of them and you cannot be recognised in them.

Our web server also keeps ordinary access logs (IP address, page requested, time) for a short period, as any web server does, to keep the site running and spot abuse.

Cookies

Two, both strictly necessary, neither used to track you: one that remembers you're logged in, and one that protects forms against cross-site request forgery. There are no advertising or analytics cookies, which is why there's no cookie banner: there's nothing to consent to.

Who else sees it

Monday.com holds the launch-notification email list on our behalf. They process it only for us, and get nothing else: no accounts, no game records.
Plausible gives us visitor numbers, and the countries the game is played in. Its script is loaded from plausible.io, so your browser does make requests to them, and like any web request that shows them your IP address. Alongside page views we send them an event when a game or a tracker match finishes, carrying only the shape of it: casual or strict, how many Features, phone or desktop, won or lost. Plausible turns the IP into a country and does not store the address, so the geography goes through them rather than us looking addresses up ourselves. It sets no cookies and builds no profile of you, and what comes back to us is counts by country, not people. Any content blocker will stop the script if you'd rather not be counted at all.
Nobody else. We don't sell your data, we don't share it with advertisers, and nothing on this site profiles you or makes automated decisions about you.

Apart from that one analytics request, everything this page loads comes from our own server, fonts included. Nothing here is fetched from Google, a CDN, or an advertising network.

Your rights

If the GDPR or UK GDPR applies to you, you have the right to get a copy of your data, correct it, have it deleted, restrict or object to how we use it, take it elsewhere in a portable form, and withdraw consent at any time. Withdrawing doesn't undo what was lawful beforehand.

Email rob@cppalliance.org and we'll action it. There's no form to fill in and we won't charge you. If we've got it wrong, you're entitled to complain to your national data protection authority.

To delete a player account, just ask. That removes the account, its game record, any feedback you sent, and the login-attempt rows tied to it. To come off the email list, use the unsubscribe link in any email from us.

Children

Boost CCG is a card game about C++ libraries. It isn't aimed at children, and we don't knowingly collect data from anyone under 16. If you think we have, tell us and we'll remove it.

Changes

If we start collecting something new, this page changes before we do. The date below is when it last did.

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Last updated 11 September 2026