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, Iridium flares and radio satellites. Main features include:Financed by advertsThis version integrates advertisements to make it available for free. Get Heavens-Above Pro to remove the adverts.
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 ISS and most visible satellites.
Iridium flares See when Iridium satellites mirror the sunlight directly towards you, resulting in bright flares.
Radio satellites Get passes for amateur radio satellites, complete with uplink and downlink information.
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.
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.
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.