Privacy notice
Beat Runner does not collect personal data. There is no account, no login, no email field, no advertising, no analytics cookie, and no third-party tracker. The game is a static page plus three JavaScript files; there is no application database and no server-side user record of any kind. Last updated August 22, 2026.
What is stored on your device
Beat Runner writes five keys to your browser's localStorage. Nothing else is
written, and none of it is transmitted anywhere.
| Key | What it holds |
|---|---|
br.best.v1 |
Your best score, accuracy, max combo and date for each track and each difficulty tier. |
br.tier.v1 |
The difficulty tier you last selected, so it is preselected next time. |
br.offset.v1 |
Your audio-visual calibration offset in milliseconds, a single number between −250 and 250. |
br.volume.v1 |
The playback volume, a number between 0 and 1. |
br.daily.v1 |
Whether you have cleared today's Daily Run, and the score you set. The date is calculated in America/New_York, so the entry rolls over at Eastern midnight. |
You can erase all of it at any time by clearing site data for this domain in your browser settings. Nothing is lost except your own scores, and the game keeps working.
Audio you load yourself
When you pick or drag an audio file into the loader, the file is read by your browser with the File API, decoded with the Web Audio API, and analyzed in memory. It is never uploaded, never written to disk by us, and never sent to any server — there is no upload endpoint in this application. Closing the tab discards it.
Anonymous performance metrics
The page loads the hosting platform's real-user-monitoring script, which reports anonymous
technical measurements: page load timings, JavaScript errors, browser and operating system
strings, an approximate region derived from the network connection, and a traffic-channel label
(for example search, social, ai or direct)
derived from the referring page and any UTM parameters in the address. These are aggregate
operations data. They contain no name, no email address, no account identifier, no score, and
nothing you typed or loaded. If you block the script, the game works exactly the same.
Server logs
Like any web server, the host records ordinary request logs (timestamp, requested path, status code, user agent, IP address) for security and reliability. These are not linked to any profile and are not used to build one.
Children
The Sprout tier exists specifically so that young children can play. Because the game collects no personal information from anyone, there is nothing to collect from a child either.
Contact
This game was built and is published by Quodara. See quodara-ai.com for contact details, or the case study for this build.