The app saves your sessions under “@flowglass/sessions/v2” and your settings (including your privacy choice) under “@flowglass/settings/v4” in your browser's local storage. This is what makes the timer, statistics and RPG progress work. It stays in your browser and is never sent to us.

A service worker caches the app’s static files (code, icons) so Flowglass opens quickly and works offline. It contains no personal data.

Vercel Web Analytics is cookieless: it does not set cookies or store identifiers in your browser. It counts visits without identifying you and records four product events described in the Privacy Policy. Decline in the privacy notice, or switch it off in Settings → Privacy & data, and nothing is sent.

If you sign in to the optional account, the sign-in session is also kept in local storage (a key starting with “sb-”) so you stay signed in; signing out removes it. It is not a cookie and is not used for tracking.

You can erase everything Flowglass stores with Settings → Privacy & data → Delete all my data, or by clearing this site’s data in your browser settings.