ClearSkys is a stargazing forecast app. We believe in transparency and minimal data collection.
No cookies. No tracking. No ads. No data sold. Anonymous analytics only. Your account data is yours.
We don't use cookies. At all. No session cookies, no tracking cookies, no third-party cookies. Our analytics tool (Umami) is completely cookie-free and GDPR compliant by design.
We use self-hosted Umami analytics to understand how the app is used — things like page views, device types, and which features people use. This data is fully anonymous, contains no personal information, and cannot be used to identify you. No data is shared with third parties.
If you create an account, we store your email address, saved locations, and notification preferences in Supabase (our database provider). This data is used solely to provide the service — loading your saved locations, sending you stargazing alerts, and authenticating your sessions.
If you choose to sign in with Google, Google shares your email address and basic profile information (name and profile picture) with us so we can create and identify your account. We request only basic profile and email access — nothing more. We don't post anything to your Google account or access any other Google data. Google's handling of your information is governed by Google's own privacy policy.
If you enable push notifications, your browser generates a unique push subscription endpoint. We store this to send you stargazing alerts. You can disable notifications at any time from the Manage Locations screen, and we'll delete your subscription data.
When you search for a location or use GPS, coordinates are sent to our server to generate the forecast. GPS data is never stored — it's used for that single request only. Saved locations (if you have an account) are stored so we can load them for you and check notification conditions.
We use Open-Meteo (weather data), Pollux Labs (ISS passes), OpenStreetMap Nominatim (geocoding), NOAA (aurora data), Supabase (auth & database), and Google (optional sign-in). Each has their own privacy policies. We don't share any personal data with the forecast services — only anonymous coordinates for forecasts.
You can delete your account and all associated data at any time. If you have questions, you can reach us at hello@clearskys.app.