Privacy Policy

Last updated: July 2, 2026

What Star Signal Does

Star Signal shows you astronomical events visible from your location when skies are clear. This policy explains what data we collect and how we use it.

Data We Collect

• Location — Your coordinates (GPS or ZIP code) to calculate which events are visible from where you are. Stored on our server rounded to ~11km precision.
• Push token — Your device's Expo push notification token, used to send you alerts about upcoming events.
• Preferences — Your event type toggles, Bortle class, and notification settings. Stored to personalize your experience.
• Purchase information — If you subscribe to Star Signal Pro, we receive your subscription status and entitlement expiration date, and store an anonymous subscriber identifier to link your subscription to your device. Payment itself is processed by Apple — we never see your name, payment card, or billing details.

Data We Do Not Collect

• Your name, email, or any account credentials
• Contacts, photos, or files on your device
• Browsing history or usage analytics
• Precise location history — we only store your most recent location

How We Use Your Data

• Calculate which astronomical events are visible from your location
• Fetch weather data for your area to assess sky conditions
• Send push notifications about events you've opted into

Third Parties

Your approximate location is shared with a weather service to check sky conditions. We use third-party services for data storage and notification delivery. Subscription purchases are processed by Apple, and subscription status is managed by RevenueCat, which receives an anonymous identifier and your purchase history for this app (see RevenueCat's privacy policy). We do not sell or share your data with advertisers or data brokers.

Data Retention

Your data is stored as long as you use the app. If you uninstall Star Signal, your push token becomes invalid and notifications stop. You can request deletion of your data by contacting us.

Contact

Questions about this policy? Reach out at support@starsignal.app.