Sputnik!

Easily spot the ISS, Starlink trains or other bright satellites overhead.

Sputnik! is an easy to use tool for predicting when the International Space Station (ISS) will pass by your location or when a bright satellite will be visible in the skies above. You can also spot the stunning band of pearls in the sky after the launch of a new batch of Starlink satellites.


Sputnik! features:

- Predictions of satellite, Starlink and ISS sightings accurate to the second.
- Predict sightings for up to 7 days ahead, or 48 hours in the past (handy if you want to find out what that bright object in the sky you just saw was).
- Detection of Starlink satellite trains.
- Second by second countdown to the satellite sighting.
- Set reminders of upcoming satellite sightings.
- Displays compass direction and elevation for your device to easily find the part of the sky where the sighting will occur (requires capable device).
- Rotate your device to landscape orientation to show exactly where the satellite will pass in the night sky.
- Easily share your sightings on social media.
- Automatic download of up to date satellite orbital data.
- Offline calculations, no need to be connected to the internet once orbital data has been downloaded.
- Input your location automatically by GPS, select from a map or enter coordinates manually.
- Save your favorite places for easy access.
- Audio cues for the last seconds before the satellite passes by.