It is visible to the naked eye!
ISS Detector is the app you need for anyone with a passion for astronomy.
ISS Detector will tell you when and where to watch for Station or Iridium flashes.
You will have an alarm within a few minutes before a passage. You will not miss a single passage of the Space Station, or even a single flash Iridium communication satellites.
+ Overview of upcoming passages
+ Weather conditions for a perfect visibility
+ Radar screen with an indication of the trajectories
+ Current position on a map type world map
+ Iridium flash detection
+ Notifications and alarms
For More Info Google Play
varies with device
Download ISS Detector Satellite Tracker 2.02.71 Unlocked APK For Android