StarWizard — Privacy Policy

Effective date: June 12, 2026

StarWizard is an offline-first astronomy app made for stargazers, families and beginners. We built it to collect as little as possible: no account, no ads, no analytics or tracking SDKs, and no sale of data — ever. This page explains the little that does leave your device, and why.

What stays on your device

Your precise location — used only to compute your sky (which stars are above your horizon). The full-precision coordinates never leave the device.
Settings and reminders — your preferences, language choice and any sky-event alarms are stored locally. Reminders are scheduled with your phone's own alarm system; no server is involved.
The sky itself — star catalogues, constellations, events and lessons are bundled with the app and computed on-device. The core app works with no internet at all.

What is sent, and when

"Ask the Wizard" questions (optional feature). When you ask the AI a question, we send: your question, the sky information already shown on your screen, your approximate location (rounded to roughly 10 km — enough to know your sky, not your street), your interface language, and a random anonymous device identifier used solely to enforce the free daily question limit. This identifier is generated by the app, is not derived from your hardware, and is not linked to your identity.
Processing. Questions are relayed through our server and answered using Anthropic's Claude API, subject to Anthropic's privacy policy. Our server logs contain timing, usage counts and a truncated device identifier — never the content of your questions or answers.
Satellite orbit data. The app periodically downloads ISS orbit data from CelesTrak (a public astronomy data service). Like any web request, this exposes your IP address to that service; no other information is sent.

What we never do

No advertising, advertising IDs, or third-party trackers.
No selling, renting or sharing of data with data brokers.
No precise location off-device; no contacts, photos, microphone or camera access.

Data retention & deletion

Everything personal lives on your device: uninstalling StarWizard removes it. The anonymous question counter on our server resets daily and is not connected to any identity. If you have questions or a request, contact us and we'll help.

Children

StarWizard is suitable for general audiences, including families. We do not knowingly collect personal information from anyone — children included. The AI feature sends only what is described above.

Changes

If this policy changes, we'll update this page and the effective date above.

Contact

[email protected]