C:\> type privacy_policy.txt
last updated: 2026-07 · controller: Sinaida Krivchenko, Prague, CZ · contact via sinaida.eu
No analytics. No tracking pixels. No advertising. No third-party cookies. No accounts. Nothing you do here is transmitted to me or to anyone else.
— your consent choice
— which questions you have visited (your n/50 progress)
— your chosen quality tier
— on touch devices, swipe or on-screen buttons
If you decline consent, nothing is stored and the experience simply forgets you
between visits. You can erase everything at any time by clearing this site's data
in your browser.
If — and only if — you choose "enter with hand tracking", your browser asks for camera permission. The video is processed entirely inside your browser by MediaPipe (an on-device machine-learning library). No frame, landmark, or any derivative of the video ever leaves your device. Closing the tab or denying permission ends it.
webcam
▼
MediaPipe, inside your browser
▼
the field
model files ──▶ MediaPipe
download only, from jsDelivr and Google
The page sends nothing back: no upload, no WebSocket, no beacon. Checked on 20 October 2026 with an automated five-minute network capture, camera on.
The site is hosted on GitHub Pages (GitHub, Inc., USA). Like any host, GitHub processes technical request data, such as your IP address and browser, to deliver the page. I do not receive those logs. Fonts and the 3D engine are served with the site. Choosing hand tracking also downloads the MediaPipe model files from jsDelivr and Google's model storage. Those CDNs see your IP address, as any download does. If you don't enable hand tracking, no request goes anywhere except the host. External links (Spotify, Instagram, sinaida.eu) are governed by their own policies.
Since no personal data reaches me, there is nothing for me to access, rectify, or delete on your behalf — the data lives only in your browser, under your control. For any question: sinaida.eu.