OverpassiPhone
Know exactly when to look up
Overpass predicts when the Starlink train, the ISS, and other bright satellites cross your sky. It downloads public orbital data once, then computes every pass on your iPhone — offline, no account, no server.
Your next visible pass is always free to see.
What Overpass is
Satellite-tracking apps tend to be cluttered star-map toys or thin wrappers around someone else's server. Overpass is neither: it is a pass predictor.
It answers one question — when should I step outside and look up? — and it computes the answer itself, on your phone, with a propagator verified against the standard reference test vectors.
What you get
The Starlink train
Freshly launched Starlink stacks make a bright, evenly spaced chain across the sky. Overpass tells you when the next train crosses yours, while it's still bright enough to be worth watching.
The ISS and bright satellites
Every visible ISS pass and the other bright satellites worth stepping outside for, with direction, elevation, and timing for your exact location.
The math runs on your device
Orbital elements are downloaded once, then every pass is propagated locally. No server computes anything for you — predictions work in a paddock with no reception.
Accurate, honestly
Pass times are typically within a minute. Satellites do manoeuvre, so Overpass makes refreshing the data before a big pass a one-tap habit, not a mystery.
Location stays yours
Grant location for effortless predictions, or type coordinates in manually. Either way it never leaves the device.
One-time unlock
Overpass Unlimited is a single one-time purchase — every Starlink train, all bright-satellite passes, and a custom minimum-elevation filter. No subscription, and your next visible pass is always free.
Privacy, by design
- No account and no sign-in.
- No analytics, no tracking, no ads, and no third-party SDKs.
- Your location, if you grant it, is used only on-device to compute passes — never stored or sent anywhere.
Read the full Privacy Policy, or visit Support.
Data sources
Overpass uses public satellite orbital element sets provided by USSPACECOM and distributed by CelesTrak (celestrak.org). Overpass is an independent app and is not affiliated with, sponsored by, or endorsed by SpaceX, Starlink, NASA, or any government agency.