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Star Signal
Know what's in the sky tonight. Planets, ISS passes, meteor showers, aurora — scored by your weather and location.
Download on the App StoreVisible Planets
See which planets are up tonight with direction and altitude.
ISS Passes
Catch the Space Station overhead with precise timing.
Meteor Showers
Never miss a peak night. Rates and radiant altitude included.
Aurora Alerts
Real-time Kp index monitoring for your geomagnetic latitude.
Moon Events
Full moons, new moons, and supermoons at a glance.
Weather-Aware
Events scored by cloud cover and visibility. No wasted trips outside.