Privacy policy
Last updated: 12 November 2026
1. Controller
Lily Lu, Leipferdinger Straße 21, 78250 Tengen, Germany. Email: lily@lily-lu.com
2. This website (geopsytric.com)
Hosting and server logs. This site is hosted on GitHub Pages, a service of GitHub, Inc., 88 Colin P. Kelly Jr. Street, San Francisco, CA 94107, USA. When you visit the site, GitHub automatically stores server log data (IP address, browser type, referrer, time of request) to deliver the pages and to keep the service secure. Legal basis: Art. 6(1)(f) GDPR (our legitimate interest in a secure and reliable website). GitHub processes this data under its own privacy statement: https://docs.github.com/site-policy/privacy-policies/github-general-privacy-statement. Data transfer to the USA is covered by the EU-US Data Privacy Framework, to which GitHub is certified.
No cookies, no tracking. This site sets no cookies and uses no analytics, no advertising networks and no social media plugins.
Fonts, images and scripts. This site uses the fonts already installed on your device and loads all images and scripts from geopsytric.com itself. No content is loaded from other servers.
Live demos. The drawing demos on this site run entirely in your browser. What you draw there is not stored or sent anywhere.
External links. This site will link to the Apple App Store and Google Play once the app is available there. Their own privacy policies apply once you follow those links.
3. The GeoPSYtric app
Local only. GeoPSYtric runs entirely on your device. The patterns you draw, your settings and your exports are stored locally on your device (in the app's own storage) and are never uploaded to us. We operate no server for the app, we run no user accounts, and we receive no personal data from the app.
No tracking in the app. The app contains no analytics, no advertising SDKs and no crash reporting that sends data to us.
Purchases. If you buy the app or an in-app unlock, the purchase is processed by Apple (App Store) or Google (Google Play) under their terms and privacy policies. We receive no payment details, only anonymised sales statistics from the store.
Exports and sharing. When you export a pattern (SVG, PNG, PDF, video) or share it, the file goes where you send it. We do not see it. A share link carries the drawing inside the link itself; it is not stored on any server.
Microphone. Music mode asks for microphone access, and only when you switch it on. The app measures the loudness live on your device to make the pattern move. Nothing is recorded, stored or sent.
Permissions. The app asks for access to your photo library or files only when you save or import a file, and only for that action.
Children. The app collects no personal data from anyone, including children.
4. Contact by email
If you write to us at lily@lily-lu.com, we store your message and address to answer it. Legal basis: Art. 6(1)(b) GDPR (pre-contractual contact) or Art. 6(1)(f) GDPR. Messages are deleted when the matter is closed and no retention duty applies.
5. Your rights
You have the right to information (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20) and objection (Art. 21). Contact: lily@lily-lu.com. You also have the right to lodge a complaint with a data protection supervisory authority; for us the competent authority is the Landesbeauftragte für den Datenschutz und die Informationsfreiheit Baden-Württemberg.
6. Changes
We update this policy when the site or the app changes. The date at the top shows the current version.