There are no accounts yet, so we hold no name, no email and no password for anybody. There are no cookies and no third-party trackers. Your streak and your stats are in your browser, not on our server.
Your played, won and streak counts, your history for the last stretch of
days, whether you have seen the intro, and a token for the round you are
part-way through. All of it is in this browser's local storage, under keys
beginning hp., and none of it is sent to us.
Clearing site data for this site deletes it, and it is gone — we have no copy to restore. That is the trade for not needing an account.
We run our own analytics rather than an advertising company's. It sets no cookie, stores nothing in your browser, and creates no identifier that can follow you to another site.
What is recorded: that a page was viewed, where the link came from, how long the page was open, some loading-speed measurements, clicks on outbound links, and milestones within a round — that a guess was made, a hint taken, a puzzle finished or abandoned.
Your IP address reaches our own collector, where it is combined with a rotating secret and hashed into a per-day number used to count visitors. We do not use it to build a profile of you, and nothing links it to what you guessed.
Aggregate counts of how many people solved a puzzle, and on which hint, are kept per day and per puzzle. They contain no identifiers — they are counters, and they are what produces "most people got this on hint three".
When you type something the guess field fails to recognise, the text is written to a log along with the puzzle and the day. Nothing identifies you and no address is stored.
This exists because an unrecognised guess still costs you a shot, and that is usually our fault rather than yours — the list of events we know is incomplete, and this is how it gets less incomplete. If it costs you something it has to be worth something to us.
If you use Report a problem, we receive the category, whatever you wrote, which puzzle it was, how many hints you had taken, and the guesses you made in that round. No identifier and no IP address is stored with it. A copy is also kept in your own browser so you can see what you sent.
Please do not put personal details in the note — there is no reason to, and we would rather not have them.
The game is open to anyone and collects nothing that identifies a person, so there is nothing held about a child any more than about anyone else.
An account will mean an email address, which is personal data in a way none of the above is. When that ships, this page will say exactly what is stored, how to export it and how to delete it — and deletion will mean deletion. Nothing in the game will move behind the account.
Questions, or something here that does not match what you have seen: ShelfControl.
Last updated 17 August 2026. About HistoryPro.