Privacy Policy

Last updated: August 6, 2026

Vesper Tesserae is designed to collect nothing. This page describes exactly what that means.

No accounts. There is no sign-up, sign-in, or user profile of any kind. The app doesn't know who you are.

No analytics or tracking. Vesper Tesserae does not use analytics services, advertising identifiers, or crash-reporting tools that transmit data off your device.

No data collection or transmission. Nothing you do in the app — the questions you hold, the concepts you draw, how often you use it — is collected, stored remotely, or sent anywhere. There is no server this app talks to for any of that.

What the app reads, and where it stays. To draw a concept, Vesper Tesserae reads several sensors already built into your phone: the time, the lunar phase (calculated from the date), barometric pressure, and compass direction. This happens entirely on your device. None of it is transmitted, logged remotely, or shared with us or anyone else.

What's stored locally. The only thing Vesper Tesserae stores on your device is the date your 7-day free trial began, so the app knows when the trial ends. That's it — it stays on your device and is never transmitted anywhere.

Location. Vesper Tesserae does not access or use your location.

Payments. The one-time unlock purchase is handled entirely by Apple through the App Store's standard purchase system. Vesper Tesserae does not receive, process, or store your payment information — Apple does.

Children's privacy. Because the app does not collect personal data from any user, including children, there is nothing collected from children specifically either.

Changes to this policy. If this policy changes, the updated version will be posted here with a new date above.

Contact. Questions about this policy can be sent to support@vespertesserae.com.