Sputnik! is an easy to use tool for predicting when the International Space Station will pass by your location or when an Iridium Flare will be visible in the skies above.

Sputnik! features:

- Predictions of satellite and ISS passes accurate to the second.
- Second by second countdown to the satellite pass.
- Automatically keeps track of the correct universal time. No need to worry about whether your device clock is accurately set.
- Notification of upcoming satellite passes even when the app is not running.
- 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.
- Tweet about sightings directly from the app (requires iOS 5.0 or higher).
- Share sightings via Facebook, Sina Weibo, Mail and Messages (requires iOS 6.0 or higher).
- 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.
- Brightness controls to preserve your night vision.


* Sputnik! is ad-supported *