Privacy
Last updated 7 September 2026
Stellar collects nothing about you.
No account
There is nothing to sign into and nothing to sign up for.
Your location
Used on the phone to work out which stars are above you. It is never sent anywhere and never stored. If you would rather not give it, you can type a town or city in by hand and Stellar will show the sky from there.
Your calendar
Add to calendar writes one event — the pass, with a reminder ten minutes before — into your own calendar. On iOS 17 and later Stellar asks only for permission to add events. iOS 16 has no add-only option, so there it asks for calendar access, but Stellar never reads a calendar back on either.
What is kept on your phone
A few settings, in this app’s own storage and nowhere else: whether you want to be told about a pass, whether the haptic guide is on, which stars you found tonight, which passes you have put in your calendar, and a one-line note of the next pass so Siri can answer without opening the app. There is no server of ours for anything to sit on. Delete the app and it all goes with it.
The internet
Stellar asks the internet for one thing: where the space station is right now, from the public wheretheiss.at service. That request says nothing about you or where you are — it asks where the station is. Like any request from any app it reaches that service from your device’s IP address, which is theirs to explain, not ours to use. Every calculation about your own sky happens on the phone.
Notifications
Worked out on your phone from your own location. Nothing about them leaves it.
No tracking
No analytics, no advertising, no third-party kits, no profiles, nothing sold or shared. There is nothing to opt out of.
Stellar is made by Drew Beattie in Christ Church, Barbados. Questions about any of this, or about a copy of what Stellar holds on you — which is nothing — go to drew@stellarsky.app.
If this policy ever changes, the date at the top changes with it.