Legal
The short version: your results stay in your browser. The one exception is the daily top score, which sends a finished run's rate and nothing that identifies you — and a checkbox on the chronometer turns even that off.
Your best score per interval is written to this browser's local storage on this device. It is never uploaded.
Every read and write is wrapped so that private browsing modes, which refuse storage, degrade quietly rather than breaking the instrument. The clear-records button on the chronometer removes those entries immediately.
When an interval closes, the chronometer sends that run to the site's daily board: the click count, the elapsed time, the interval it was run on, and statistics describing the spacing of the presses. It sends no identifier of any kind.
The board keeps only the resulting rate, the interval id and the date, in a store that expires every entry after four days. There is no name attached, no cookie, no visitor id and no ordering that could be walked back to a person — one number per run, in a pile with everyone else's.
The gap statistics exist for one purpose: telling a hand apart from an autoclicker, which is what keeps the board readable. They are checked when the run arrives and are never stored.
To stop taking part, tick Keep my results private on the chronometer. The preference is stored in this browser, the board readout keeps working, and nothing further is sent.
Submissions are rate-limited per network address to keep the board from being flooded. That counter is a salted one-way hash, is not readable as an address, and expires daily. The address itself is never written down.
The host that serves these pages keeps standard access logs — IP address, user agent, requested path, timestamp — for security and capacity planning. Those logs are not joined to any measurement you take.
Messages sent through the contact form are delivered by a third-party form service to our inbox. They contain what you type: your name, your email address and your message. We use them to reply and nothing else.
Because no personal data is held server-side, there is no profile to export or erase. If you have written to us and want that correspondence deleted, ask and it will be.