Perigee: ISS Satellite Tracker

Perigee tells you exactly when satellites will fly over your location — and alerts you before they appear, so you never miss a pass.

Point your phone at the sky and find the ISS, Starlink and Hubble with the AR camera view. Tap any pass to see its exact path across your sky.

── WHAT PERIGEE DOES ──

Satellite pass predictor
Perigee calculates upcoming passes for your exact GPS location from live orbital data: start time, peak elevation, direction, duration and brightness for every pass, up to 72 hours ahead.

Pass alerts
Get a notification minutes before a satellite rises. Alerts are skipped automatically when it's cloudy, and the lead time is yours to set.

Pass detail & sky path chart
See where the satellite rises, peaks and sets on a compass chart of your sky, with a live marker while it's overhead. Add the pass to your calendar or share it with a friend in one tap.

AR sky view
Hold up your phone and see where to look. No star charts needed.

Sky Tonight
Every pass tonight and tomorrow, plus meteor showers and upcoming rocket launches in one place.

Sighting log
Mark the passes you spotted, build a streak and earn badges.

── 200+ SATELLITES ──

• ISS — International Space Station
• Starlink — the newest batch, grouped as a "train" when they fly in a line
• Hubble Space Telescope
• Weather satellites — NOAA, METOP, Meteor, Fengyun, Sentinel-3
• Amateur radio satellites — 90+ AMSAT objects
• Any satellite you like — add it by NORAD ID

── WHY PERIGEE ──

✓ Real SGP4 orbital predictions — the method used by space agencies
✓ Honest brightness estimates from real satellite size data
✓ Live orbit data from CelesTrak, refreshed daily
✓ Works offline after the first sync
✓ Dark theme that's easy on night-adapted eyes
✓ No account. No subscription. Free.

── EXPLORE ──

Space news, upcoming launches, who's in space right now, and the meteor shower calendar.

Perigee is built for satellite watchers, ISS spotters, astrophotographers and anyone who looks up and wonders what's flying overhead.

Download free. Look up tonight.