Privacy
Nothing leaves your browser
What we collect
Nothing. This site is a static page with a test script. There are no analytics, no cookies, no third-party requests and no server that ever sees your presses.
Where your records go
Personal bests and attempt history are saved in your browser's local storage under keys starting with sct:. They stay on the device you played on and are never transmitted anywhere.
Deleting your data
Use the “Clear” button in the records area for the current timer length, or clear site data in your browser settings to remove everything at once. CSV exports you create are generated locally in your own downloads.
Sound preference
The sound toggle stores a single on/off preference in the same local storage — again, on your device only.
If this page doesn't make sense for the site you're looking at, stop and trust your own judgment — a browser dev-tools network tab will always confirm that this site sends nothing.