When can I see the ISS? What's that light in the sky? The official Heavens-Above app provides you with precise pass predictions for the ISS, visible satellites and radio satellites. Main features include:


Live sky chart  
See what's in the sky above you right now or at a given moment.

Pass predictions  
Get precise predictions for passes of the International Space Station (ISS) and most visible satellites.

Radio satellites  
Get passes for amateur radio satellites, complete with uplink and downlink information.

Comets  
Find the location of bright comets, including NEOWISE, in the sky.

All calculations performed locally  
Predictions are generated right on your phone so you only need a data connection every few days.

Orbit and ground track  
See details about the orbit of any selected satellite rendered and with all relevant data.

Pro version only: The position of all satellites can be displayed at once and filtered down.

Satellite details  
Get detailed information about any satellite, as provided by our Heavens-Above website.

Timeline  
Get a visual overview over passes and animate the position of satellites on the sky chart and on the ground track.

Pro version only: The timeline contains the elevation and detailed brightness prediction of passes.

Night mode  
An optional red on black color scheme to preserve your night vision.

Tracker  
Easily find or identify any object in the sky by orienting your device towards it.

Calendar Integration  
Quickly add interesting passes to your calendar so you won't miss them.

Custom TLEs
Pro version only: You can create satellite entries with your own TLEs.

No advertisements
Pro version only: This version is free of advertisements. You can try the free version before buying this one.

Identify lights in the night sky, predict passes of the ISS and of satellites